Home / 20,319.80-30,479.36-7,002.18

Finding the Fourth Proportional to 20,319.80, 30,479.36 and 7,002.18

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Solution

The fourth proportional to 20,319.80, 30,479.36 and 7,002.18 is: 10,503.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.80 : 30,479.36 = 7,002.18 : x
  2. Step 2: Convert to fraction form
    20,319.80/30,479.36 = 7,002.18/x
  3. Step 3: Cross multiply
    20,319.80x = 30,479.36 × 7,002.18
  4. Step 4: Simplify right side
    20,319.80x = 213,421,929.99
  5. Step 5: Solve for x
    x = 213,421,929.99/20,319.80
  6. Step 6: Final answer
    x = 10,503.15

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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.