Home / 11,931.20-16,455.52-7,446.40

Finding the Fourth Proportional to 11,931.20, 16,455.52 and 7,446.40

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Solution

The fourth proportional to 11,931.20, 16,455.52 and 7,446.40 is: 10,270.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,931.20 : 16,455.52 = 7,446.40 : x
  2. Step 2: Convert to fraction form
    11,931.20/16,455.52 = 7,446.40/x
  3. Step 3: Cross multiply
    11,931.20x = 16,455.52 × 7,446.40
  4. Step 4: Simplify right side
    11,931.20x = 122,534,384.13
  5. Step 5: Solve for x
    x = 122,534,384.13/11,931.20
  6. Step 6: Final answer
    x = 10,270.08

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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.