Home / 42,720.68-64,088.31-13,137.86

Finding the Fourth Proportional to 42,720.68, 64,088.31 and 13,137.86

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Solution

The fourth proportional to 42,720.68, 64,088.31 and 13,137.86 is: 19,709.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,720.68 : 64,088.31 = 13,137.86 : x
  2. Step 2: Convert to fraction form
    42,720.68/64,088.31 = 13,137.86/x
  3. Step 3: Cross multiply
    42,720.68x = 64,088.31 × 13,137.86
  4. Step 4: Simplify right side
    42,720.68x = 841,983,453.90
  5. Step 5: Solve for x
    x = 841,983,453.90/42,720.68
  6. Step 6: Final answer
    x = 19,709.04

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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.