Home / 10,565.60-15,848.40-8,112.80

Finding the Fourth Proportional to 10,565.60, 15,848.40 and 8,112.80

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Solution

The fourth proportional to 10,565.60, 15,848.40 and 8,112.80 is: 12,169.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,565.60 : 15,848.40 = 8,112.80 : x
  2. Step 2: Convert to fraction form
    10,565.60/15,848.40 = 8,112.80/x
  3. Step 3: Cross multiply
    10,565.60x = 15,848.40 × 8,112.80
  4. Step 4: Simplify right side
    10,565.60x = 128,574,899.52
  5. Step 5: Solve for x
    x = 128,574,899.52/10,565.60
  6. Step 6: Final answer
    x = 12,169.20

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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.