Home / 28,292-39,042.96-15,719.36

Finding the Fourth Proportional to 28,292, 39,042.96 and 15,719.36

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Solution

The fourth proportional to 28,292, 39,042.96 and 15,719.36 is: 21,692.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,292 : 39,042.96 = 15,719.36 : x
  2. Step 2: Convert to fraction form
    28,292/39,042.96 = 15,719.36/x
  3. Step 3: Cross multiply
    28,292x = 39,042.96 × 15,719.36
  4. Step 4: Simplify right side
    28,292x = 613,730,343.71
  5. Step 5: Solve for x
    x = 613,730,343.71/28,292
  6. Step 6: Final answer
    x = 21,692.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.