Home / 15,805.95-21,785.18-12,262.47

Finding the Fourth Proportional to 15,805.95, 21,785.18 and 12,262.47

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Solution

The fourth proportional to 15,805.95, 21,785.18 and 12,262.47 is: 16,901.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,805.95 : 21,785.18 = 12,262.47 : x
  2. Step 2: Convert to fraction form
    15,805.95/21,785.18 = 12,262.47/x
  3. Step 3: Cross multiply
    15,805.95x = 21,785.18 × 12,262.47
  4. Step 4: Simplify right side
    15,805.95x = 267,140,037.92
  5. Step 5: Solve for x
    x = 267,140,037.92/15,805.95
  6. Step 6: Final answer
    x = 16,901.24

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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.