Home / 20,518,720-28,327,134.72-15,360,225.28

Finding the Fourth Proportional to 20,518,720, 28,327,134.72 and 15,360,225.28

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Solution

The fourth proportional to 20,518,720, 28,327,134.72 and 15,360,225.28 is: 21,205,570.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518,720 : 28,327,134.72 = 15,360,225.28 : x
  2. Step 2: Convert to fraction form
    20,518,720/28,327,134.72 = 15,360,225.28/x
  3. Step 3: Cross multiply
    20,518,720x = 28,327,134.72 × 15,360,225.28
  4. Step 4: Simplify right side
    20,518,720x = 435,111,170,836,109.69
  5. Step 5: Solve for x
    x = 435,111,170,836,109.69/20,518,720
  6. Step 6: Final answer
    x = 21,205,570.86

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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.