Home / 21,000.30-31,501.58-8,518.46

Finding the Fourth Proportional to 21,000.30, 31,501.58 and 8,518.46

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Solution

The fourth proportional to 21,000.30, 31,501.58 and 8,518.46 is: 12,778.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.30 : 31,501.58 = 8,518.46 : x
  2. Step 2: Convert to fraction form
    21,000.30/31,501.58 = 8,518.46/x
  3. Step 3: Cross multiply
    21,000.30x = 31,501.58 × 8,518.46
  4. Step 4: Simplify right side
    21,000.30x = 268,344,949.17
  5. Step 5: Solve for x
    x = 268,344,949.17/21,000.30
  6. Step 6: Final answer
    x = 12,778.15

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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.