Home / 15,686.80-21,648.92-10,372.40

Finding the Fourth Proportional to 15,686.80, 21,648.92 and 10,372.40

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Solution

The fourth proportional to 15,686.80, 21,648.92 and 10,372.40 is: 14,314.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.80 : 21,648.92 = 10,372.40 : x
  2. Step 2: Convert to fraction form
    15,686.80/21,648.92 = 10,372.40/x
  3. Step 3: Cross multiply
    15,686.80x = 21,648.92 × 10,372.40
  4. Step 4: Simplify right side
    15,686.80x = 224,551,257.81
  5. Step 5: Solve for x
    x = 224,551,257.81/15,686.80
  6. Step 6: Final answer
    x = 14,314.66

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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.