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Finding the Fourth Proportional to 8,913.80, 13,356.12 and 6,312.08

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Solution

The fourth proportional to 8,913.80, 13,356.12 and 6,312.08 is: 9,457.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,913.80 : 13,356.12 = 6,312.08 : x
  2. Step 2: Convert to fraction form
    8,913.80/13,356.12 = 6,312.08/x
  3. Step 3: Cross multiply
    8,913.80x = 13,356.12 × 6,312.08
  4. Step 4: Simplify right side
    8,913.80x = 84,304,897.93
  5. Step 5: Solve for x
    x = 84,304,897.93/8,913.80
  6. Step 6: Final answer
    x = 9,457.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.