Home / 15,318.40-21,141.68-9,353.52

Finding the Fourth Proportional to 15,318.40, 21,141.68 and 9,353.52

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Solution

The fourth proportional to 15,318.40, 21,141.68 and 9,353.52 is: 12,909.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,318.40 : 21,141.68 = 9,353.52 : x
  2. Step 2: Convert to fraction form
    15,318.40/21,141.68 = 9,353.52/x
  3. Step 3: Cross multiply
    15,318.40x = 21,141.68 × 9,353.52
  4. Step 4: Simplify right side
    15,318.40x = 197,749,126.71
  5. Step 5: Solve for x
    x = 197,749,126.71/15,318.40
  6. Step 6: Final answer
    x = 12,909.25

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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.