Home / 10,928.20-15,060.90-7,938.80

Finding the Fourth Proportional to 10,928.20, 15,060.90 and 7,938.80

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Solution

The fourth proportional to 10,928.20, 15,060.90 and 7,938.80 is: 10,941.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,928.20 : 15,060.90 = 7,938.80 : x
  2. Step 2: Convert to fraction form
    10,928.20/15,060.90 = 7,938.80/x
  3. Step 3: Cross multiply
    10,928.20x = 15,060.90 × 7,938.80
  4. Step 4: Simplify right side
    10,928.20x = 119,565,472.92
  5. Step 5: Solve for x
    x = 119,565,472.92/10,928.20
  6. Step 6: Final answer
    x = 10,941.00

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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.