Home / 15,177.98-20,956.40-12,666.58

Finding the Fourth Proportional to 15,177.98, 20,956.40 and 12,666.58

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Solution

The fourth proportional to 15,177.98, 20,956.40 and 12,666.58 is: 17,488.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,177.98 : 20,956.40 = 12,666.58 : x
  2. Step 2: Convert to fraction form
    15,177.98/20,956.40 = 12,666.58/x
  3. Step 3: Cross multiply
    15,177.98x = 20,956.40 × 12,666.58
  4. Step 4: Simplify right side
    15,177.98x = 265,445,917.11
  5. Step 5: Solve for x
    x = 265,445,917.11/15,177.98
  6. Step 6: Final answer
    x = 17,488.88

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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.