Home / 12,956.40-17,888.28-9,966.72

Finding the Fourth Proportional to 12,956.40, 17,888.28 and 9,966.72

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Solution

The fourth proportional to 12,956.40, 17,888.28 and 9,966.72 is: 13,760.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,956.40 : 17,888.28 = 9,966.72 : x
  2. Step 2: Convert to fraction form
    12,956.40/17,888.28 = 9,966.72/x
  3. Step 3: Cross multiply
    12,956.40x = 17,888.28 × 9,966.72
  4. Step 4: Simplify right side
    12,956.40x = 178,287,478.04
  5. Step 5: Solve for x
    x = 178,287,478.04/12,956.40
  6. Step 6: Final answer
    x = 13,760.57

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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.