Home / 15,616.40-21,534.52-13,385.68

Finding the Fourth Proportional to 15,616.40, 21,534.52 and 13,385.68

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Solution

The fourth proportional to 15,616.40, 21,534.52 and 13,385.68 is: 18,458.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,616.40 : 21,534.52 = 13,385.68 : x
  2. Step 2: Convert to fraction form
    15,616.40/21,534.52 = 13,385.68/x
  3. Step 3: Cross multiply
    15,616.40x = 21,534.52 × 13,385.68
  4. Step 4: Simplify right side
    15,616.40x = 288,254,193.67
  5. Step 5: Solve for x
    x = 288,254,193.67/15,616.40
  6. Step 6: Final answer
    x = 18,458.43

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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.