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Finding the Fourth Proportional to 20,980.98, 28,957.95 and 12,034.53

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Solution

The fourth proportional to 20,980.98, 28,957.95 and 12,034.53 is: 16,610.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,980.98 : 28,957.95 = 12,034.53 : x
  2. Step 2: Convert to fraction form
    20,980.98/28,957.95 = 12,034.53/x
  3. Step 3: Cross multiply
    20,980.98x = 28,957.95 × 12,034.53
  4. Step 4: Simplify right side
    20,980.98x = 348,495,318.01
  5. Step 5: Solve for x
    x = 348,495,318.01/20,980.98
  6. Step 6: Final answer
    x = 16,610.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.