Home / 42,969.11-64,462.16-13,385.68

Finding the Fourth Proportional to 42,969.11, 64,462.16 and 13,385.68

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Solution

The fourth proportional to 42,969.11, 64,462.16 and 13,385.68 is: 20,081.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,969.11 : 64,462.16 = 13,385.68 : x
  2. Step 2: Convert to fraction form
    42,969.11/64,462.16 = 13,385.68/x
  3. Step 3: Cross multiply
    42,969.11x = 64,462.16 × 13,385.68
  4. Step 4: Simplify right side
    42,969.11x = 862,869,718.18
  5. Step 5: Solve for x
    x = 862,869,718.18/42,969.11
  6. Step 6: Final answer
    x = 20,081.17

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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.