Home / 15,817.58-21,854.51-12,485.85

Finding the Fourth Proportional to 15,817.58, 21,854.51 and 12,485.85

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Solution

The fourth proportional to 15,817.58, 21,854.51 and 12,485.85 is: 17,251.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,817.58 : 21,854.51 = 12,485.85 : x
  2. Step 2: Convert to fraction form
    15,817.58/21,854.51 = 12,485.85/x
  3. Step 3: Cross multiply
    15,817.58x = 21,854.51 × 12,485.85
  4. Step 4: Simplify right side
    15,817.58x = 272,872,036.12
  5. Step 5: Solve for x
    x = 272,872,036.12/15,817.58
  6. Step 6: Final answer
    x = 17,251.19

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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.