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Finding the Fourth Proportional to 8,985, 12,402.54 and 5,259

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Solution

The fourth proportional to 8,985, 12,402.54 and 5,259 is: 7,259.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,985 : 12,402.54 = 5,259 : x
  2. Step 2: Convert to fraction form
    8,985/12,402.54 = 5,259/x
  3. Step 3: Cross multiply
    8,985x = 12,402.54 × 5,259
  4. Step 4: Simplify right side
    8,985x = 65,224,957.86
  5. Step 5: Solve for x
    x = 65,224,957.86/8,985
  6. Step 6: Final answer
    x = 7,259.32

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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.