Home / 12,931.40-19,397.10-10,011.80

Finding the Fourth Proportional to 12,931.40, 19,397.10 and 10,011.80

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Solution

The fourth proportional to 12,931.40, 19,397.10 and 10,011.80 is: 15,017.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,931.40 : 19,397.10 = 10,011.80 : x
  2. Step 2: Convert to fraction form
    12,931.40/19,397.10 = 10,011.80/x
  3. Step 3: Cross multiply
    12,931.40x = 19,397.10 × 10,011.80
  4. Step 4: Simplify right side
    12,931.40x = 194,199,885.78
  5. Step 5: Solve for x
    x = 194,199,885.78/12,931.40
  6. Step 6: Final answer
    x = 15,017.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.