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Finding the Fourth Proportional to 20,693.76, 31,060.06 and 10,840.10

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Solution

The fourth proportional to 20,693.76, 31,060.06 and 10,840.10 is: 16,270.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,693.76 : 31,060.06 = 10,840.10 : x
  2. Step 2: Convert to fraction form
    20,693.76/31,060.06 = 10,840.10/x
  3. Step 3: Cross multiply
    20,693.76x = 31,060.06 × 10,840.10
  4. Step 4: Simplify right side
    20,693.76x = 336,694,156.41
  5. Step 5: Solve for x
    x = 336,694,156.41/20,693.76
  6. Step 6: Final answer
    x = 16,270.32

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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.