Home / 8,989.36-12,402.63-5,160.74

Finding the Fourth Proportional to 8,989.36, 12,402.63 and 5,160.74

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Solution

The fourth proportional to 8,989.36, 12,402.63 and 5,160.74 is: 7,120.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.36 : 12,402.63 = 5,160.74 : x
  2. Step 2: Convert to fraction form
    8,989.36/12,402.63 = 5,160.74/x
  3. Step 3: Cross multiply
    8,989.36x = 12,402.63 × 5,160.74
  4. Step 4: Simplify right side
    8,989.36x = 64,006,686.73
  5. Step 5: Solve for x
    x = 64,006,686.73/8,989.36
  6. Step 6: Final answer
    x = 7,120.27

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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.