Home / 28,264.60-39,002.34-15,688

Finding the Fourth Proportional to 28,264.60, 39,002.34 and 15,688

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Solution

The fourth proportional to 28,264.60, 39,002.34 and 15,688 is: 21,647.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,264.60 : 39,002.34 = 15,688 : x
  2. Step 2: Convert to fraction form
    28,264.60/39,002.34 = 15,688/x
  3. Step 3: Cross multiply
    28,264.60x = 39,002.34 × 15,688
  4. Step 4: Simplify right side
    28,264.60x = 611,868,709.92
  5. Step 5: Solve for x
    x = 611,868,709.92/28,264.60
  6. Step 6: Final answer
    x = 21,647.88

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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.