Home / 42,972.48-64,457.64-13,390.20

Finding the Fourth Proportional to 42,972.48, 64,457.64 and 13,390.20

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Solution

The fourth proportional to 42,972.48, 64,457.64 and 13,390.20 is: 20,084.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,972.48 : 64,457.64 = 13,390.20 : x
  2. Step 2: Convert to fraction form
    42,972.48/64,457.64 = 13,390.20/x
  3. Step 3: Cross multiply
    42,972.48x = 64,457.64 × 13,390.20
  4. Step 4: Simplify right side
    42,972.48x = 863,100,691.13
  5. Step 5: Solve for x
    x = 863,100,691.13/42,972.48
  6. Step 6: Final answer
    x = 20,084.96

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1.5x scale

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.