Home / 13,521.12-20,281.44-4,287.12

Finding the Fourth Proportional to 13,521.12, 20,281.44 and 4,287.12

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Solution

The fourth proportional to 13,521.12, 20,281.44 and 4,287.12 is: 6,430.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,521.12 : 20,281.44 = 4,287.12 : x
  2. Step 2: Convert to fraction form
    13,521.12/20,281.44 = 4,287.12/x
  3. Step 3: Cross multiply
    13,521.12x = 20,281.44 × 4,287.12
  4. Step 4: Simplify right side
    13,521.12x = 86,948,967.05
  5. Step 5: Solve for x
    x = 86,948,967.05/13,521.12
  6. Step 6: Final answer
    x = 6,430.60

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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.