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Finding the Fourth Proportional to 8,903.60, 12,287.90 and 5,127.76

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Solution

The fourth proportional to 8,903.60, 12,287.90 and 5,127.76 is: 7,076.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,903.60 : 12,287.90 = 5,127.76 : x
  2. Step 2: Convert to fraction form
    8,903.60/12,287.90 = 5,127.76/x
  3. Step 3: Cross multiply
    8,903.60x = 12,287.90 × 5,127.76
  4. Step 4: Simplify right side
    8,903.60x = 63,009,361.16
  5. Step 5: Solve for x
    x = 63,009,361.16/8,903.60
  6. Step 6: Final answer
    x = 7,076.84

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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.