Home / 28,518,815,681.86-39,353,990,699.28-15,830,551,975.72

Finding the Fourth Proportional to 28,518,815,681.86, 39,353,990,699.28 and 15,830,551,975.72

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Solution

The fourth proportional to 28,518,815,681.86, 39,353,990,699.28 and 15,830,551,975.72 is: 21,845,065,453.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,518,815,681.86 : 39,353,990,699.28 = 15,830,551,975.72 : x
  2. Step 2: Convert to fraction form
    28,518,815,681.86/39,353,990,699.28 = 15,830,551,975.72/x
  3. Step 3: Cross multiply
    28,518,815,681.86x = 39,353,990,699.28 × 15,830,551,975.72
  4. Step 4: Simplify right side
    28,518,815,681.86x = 622,995,395,216,953,442,304
  5. Step 5: Solve for x
    x = 622,995,395,216,953,442,304/28,518,815,681.86
  6. Step 6: Final answer
    x = 21,845,065,453.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.