Home / 10,931.60-16,397.40-3,139.40

Finding the Fourth Proportional to 10,931.60, 16,397.40 and 3,139.40

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Solution

The fourth proportional to 10,931.60, 16,397.40 and 3,139.40 is: 4,709.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,931.60 : 16,397.40 = 3,139.40 : x
  2. Step 2: Convert to fraction form
    10,931.60/16,397.40 = 3,139.40/x
  3. Step 3: Cross multiply
    10,931.60x = 16,397.40 × 3,139.40
  4. Step 4: Simplify right side
    10,931.60x = 51,477,997.56
  5. Step 5: Solve for x
    x = 51,477,997.56/10,931.60
  6. Step 6: Final answer
    x = 4,709.10

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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.