Home / 42,709.47-64,070.33-13,129.79

Finding the Fourth Proportional to 42,709.47, 64,070.33 and 13,129.79

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Solution

The fourth proportional to 42,709.47, 64,070.33 and 13,129.79 is: 19,696.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,709.47 : 64,070.33 = 13,129.79 : x
  2. Step 2: Convert to fraction form
    42,709.47/64,070.33 = 13,129.79/x
  3. Step 3: Cross multiply
    42,709.47x = 64,070.33 × 13,129.79
  4. Step 4: Simplify right side
    42,709.47x = 841,229,592.13
  5. Step 5: Solve for x
    x = 841,229,592.13/42,709.47
  6. Step 6: Final answer
    x = 19,696.56

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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.