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Finding the Fourth Proportional to 8,812.86, 12,154.66 and 7,748.35

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Solution

The fourth proportional to 8,812.86, 12,154.66 and 7,748.35 is: 10,686.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,812.86 : 12,154.66 = 7,748.35 : x
  2. Step 2: Convert to fraction form
    8,812.86/12,154.66 = 7,748.35/x
  3. Step 3: Cross multiply
    8,812.86x = 12,154.66 × 7,748.35
  4. Step 4: Simplify right side
    8,812.86x = 94,178,559.81
  5. Step 5: Solve for x
    x = 94,178,559.81/8,812.86
  6. Step 6: Final answer
    x = 10,686.49

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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.