Home / 8,987.69-12,402.51-6,864.68

Finding the Fourth Proportional to 8,987.69, 12,402.51 and 6,864.68

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Solution

The fourth proportional to 8,987.69, 12,402.51 and 6,864.68 is: 9,472.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.69 : 12,402.51 = 6,864.68 : x
  2. Step 2: Convert to fraction form
    8,987.69/12,402.51 = 6,864.68/x
  3. Step 3: Cross multiply
    8,987.69x = 12,402.51 × 6,864.68
  4. Step 4: Simplify right side
    8,987.69x = 85,139,262.35
  5. Step 5: Solve for x
    x = 85,139,262.35/8,987.69
  6. Step 6: Final answer
    x = 9,472.87

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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.