Home / 20,215.40-30,312.30-7,068.20

Finding the Fourth Proportional to 20,215.40, 30,312.30 and 7,068.20

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Solution

The fourth proportional to 20,215.40, 30,312.30 and 7,068.20 is: 10,598.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,215.40 : 30,312.30 = 7,068.20 : x
  2. Step 2: Convert to fraction form
    20,215.40/30,312.30 = 7,068.20/x
  3. Step 3: Cross multiply
    20,215.40x = 30,312.30 × 7,068.20
  4. Step 4: Simplify right side
    20,215.40x = 214,253,398.86
  5. Step 5: Solve for x
    x = 214,253,398.86/20,215.40
  6. Step 6: Final answer
    x = 10,598.52

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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.