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Finding the Fourth Proportional to 8,973.68, 12,389.78 and 5,617.85

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Solution

The fourth proportional to 8,973.68, 12,389.78 and 5,617.85 is: 7,756.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,973.68 : 12,389.78 = 5,617.85 : x
  2. Step 2: Convert to fraction form
    8,973.68/12,389.78 = 5,617.85/x
  3. Step 3: Cross multiply
    8,973.68x = 12,389.78 × 5,617.85
  4. Step 4: Simplify right side
    8,973.68x = 69,603,897.48
  5. Step 5: Solve for x
    x = 69,603,897.48/8,973.68
  6. Step 6: Final answer
    x = 7,756.45

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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.