Home / 20,157,142.32-30,217,809.15-7,858,270.80

Finding the Fourth Proportional to 20,157,142.32, 30,217,809.15 and 7,858,270.80

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Solution

The fourth proportional to 20,157,142.32, 30,217,809.15 and 7,858,270.80 is: 11,780,426.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,157,142.32 : 30,217,809.15 = 7,858,270.80 : x
  2. Step 2: Convert to fraction form
    20,157,142.32/30,217,809.15 = 7,858,270.80/x
  3. Step 3: Cross multiply
    20,157,142.32x = 30,217,809.15 × 7,858,270.80
  4. Step 4: Simplify right side
    20,157,142.32x = 237,459,727,283,417.81
  5. Step 5: Solve for x
    x = 237,459,727,283,417.81/20,157,142.32
  6. Step 6: Final answer
    x = 11,780,426.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.