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Finding the Fourth Proportional to 8,875.68, 12,243.01 and 5,687.91

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Solution

The fourth proportional to 8,875.68, 12,243.01 and 5,687.91 is: 7,845.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,875.68 : 12,243.01 = 5,687.91 : x
  2. Step 2: Convert to fraction form
    8,875.68/12,243.01 = 5,687.91/x
  3. Step 3: Cross multiply
    8,875.68x = 12,243.01 × 5,687.91
  4. Step 4: Simplify right side
    8,875.68x = 69,637,139.01
  5. Step 5: Solve for x
    x = 69,637,139.01/8,875.68
  6. Step 6: Final answer
    x = 7,845.84

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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.