Home / 15,479.52-21,313.18-13,660.68

Finding the Fourth Proportional to 15,479.52, 21,313.18 and 13,660.68

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Solution

The fourth proportional to 15,479.52, 21,313.18 and 13,660.68 is: 18,808.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,479.52 : 21,313.18 = 13,660.68 : x
  2. Step 2: Convert to fraction form
    15,479.52/21,313.18 = 13,660.68/x
  3. Step 3: Cross multiply
    15,479.52x = 21,313.18 × 13,660.68
  4. Step 4: Simplify right side
    15,479.52x = 291,152,531.76
  5. Step 5: Solve for x
    x = 291,152,531.76/15,479.52
  6. Step 6: Final answer
    x = 18,808.89

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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.