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Finding the Fourth Proportional to 15,090.81, 20,827.80 and 8,803.17

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Solution

The fourth proportional to 15,090.81, 20,827.80 and 8,803.17 is: 12,149.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,090.81 : 20,827.80 = 8,803.17 : x
  2. Step 2: Convert to fraction form
    15,090.81/20,827.80 = 8,803.17/x
  3. Step 3: Cross multiply
    15,090.81x = 20,827.80 × 8,803.17
  4. Step 4: Simplify right side
    15,090.81x = 183,350,664.13
  5. Step 5: Solve for x
    x = 183,350,664.13/15,090.81
  6. Step 6: Final answer
    x = 12,149.82

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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.