Home / 15,411.35-21,247.86-12,575.84

Finding the Fourth Proportional to 15,411.35, 21,247.86 and 12,575.84

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Solution

The fourth proportional to 15,411.35, 21,247.86 and 12,575.84 is: 17,338.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,411.35 : 21,247.86 = 12,575.84 : x
  2. Step 2: Convert to fraction form
    15,411.35/21,247.86 = 12,575.84/x
  3. Step 3: Cross multiply
    15,411.35x = 21,247.86 × 12,575.84
  4. Step 4: Simplify right side
    15,411.35x = 267,209,687.70
  5. Step 5: Solve for x
    x = 267,209,687.70/15,411.35
  6. Step 6: Final answer
    x = 17,338.50

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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.