Home / 15,390.40-23,053.20-8,456.80

Finding the Fourth Proportional to 15,390.40, 23,053.20 and 8,456.80

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Solution

The fourth proportional to 15,390.40, 23,053.20 and 8,456.80 is: 12,667.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390.40 : 23,053.20 = 8,456.80 : x
  2. Step 2: Convert to fraction form
    15,390.40/23,053.20 = 8,456.80/x
  3. Step 3: Cross multiply
    15,390.40x = 23,053.20 × 8,456.80
  4. Step 4: Simplify right side
    15,390.40x = 194,956,301.76
  5. Step 5: Solve for x
    x = 194,956,301.76/15,390.40
  6. Step 6: Final answer
    x = 12,667.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.