Home / 20,386,648.72-28,133,567.08-11,219,291.47

Finding the Fourth Proportional to 20,386,648.72, 28,133,567.08 and 11,219,291.47

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Solution

The fourth proportional to 20,386,648.72, 28,133,567.08 and 11,219,291.47 is: 15,482,617.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386,648.72 : 28,133,567.08 = 11,219,291.47 : x
  2. Step 2: Convert to fraction form
    20,386,648.72/28,133,567.08 = 11,219,291.47/x
  3. Step 3: Cross multiply
    20,386,648.72x = 28,133,567.08 × 11,219,291.47
  4. Step 4: Simplify right side
    20,386,648.72x = 315,638,689,161,316.81
  5. Step 5: Solve for x
    x = 315,638,689,161,316.81/20,386,648.72
  6. Step 6: Final answer
    x = 15,482,617.74

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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.