Home / 13,569.60-20,354.40-8,919.20

Finding the Fourth Proportional to 13,569.60, 20,354.40 and 8,919.20

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Solution

The fourth proportional to 13,569.60, 20,354.40 and 8,919.20 is: 13,378.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,569.60 : 20,354.40 = 8,919.20 : x
  2. Step 2: Convert to fraction form
    13,569.60/20,354.40 = 8,919.20/x
  3. Step 3: Cross multiply
    13,569.60x = 20,354.40 × 8,919.20
  4. Step 4: Simplify right side
    13,569.60x = 181,544,964.48
  5. Step 5: Solve for x
    x = 181,544,964.48/13,569.60
  6. Step 6: Final answer
    x = 13,378.80

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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.