Home / 8,928.66-12,318.30-5,390.58

Finding the Fourth Proportional to 8,928.66, 12,318.30 and 5,390.58

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Solution

The fourth proportional to 8,928.66, 12,318.30 and 5,390.58 is: 7,437.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,928.66 : 12,318.30 = 5,390.58 : x
  2. Step 2: Convert to fraction form
    8,928.66/12,318.30 = 5,390.58/x
  3. Step 3: Cross multiply
    8,928.66x = 12,318.30 × 5,390.58
  4. Step 4: Simplify right side
    8,928.66x = 66,402,781.61
  5. Step 5: Solve for x
    x = 66,402,781.61/8,928.66
  6. Step 6: Final answer
    x = 7,437.04

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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.