Home / 10,669.60-15,985.20-9,440.80

Finding the Fourth Proportional to 10,669.60, 15,985.20 and 9,440.80

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Solution

The fourth proportional to 10,669.60, 15,985.20 and 9,440.80 is: 14,144.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,669.60 : 15,985.20 = 9,440.80 : x
  2. Step 2: Convert to fraction form
    10,669.60/15,985.20 = 9,440.80/x
  3. Step 3: Cross multiply
    10,669.60x = 15,985.20 × 9,440.80
  4. Step 4: Simplify right side
    10,669.60x = 150,913,076.16
  5. Step 5: Solve for x
    x = 150,913,076.16/10,669.60
  6. Step 6: Final answer
    x = 14,144.21

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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.