Home / 7,487.10-11,242.80-5,421.60

Finding the Fourth Proportional to 7,487.10, 11,242.80 and 5,421.60

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Solution

The fourth proportional to 7,487.10, 11,242.80 and 5,421.60 is: 8,141.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,487.10 : 11,242.80 = 5,421.60 : x
  2. Step 2: Convert to fraction form
    7,487.10/11,242.80 = 5,421.60/x
  3. Step 3: Cross multiply
    7,487.10x = 11,242.80 × 5,421.60
  4. Step 4: Simplify right side
    7,487.10x = 60,953,964.48
  5. Step 5: Solve for x
    x = 60,953,964.48/7,487.10
  6. Step 6: Final answer
    x = 8,141.20

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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.