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Finding the Fourth Proportional to 8,688.47, 12,969.79 and 7,637.54

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Solution

The fourth proportional to 8,688.47, 12,969.79 and 7,637.54 is: 11,401.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.47 : 12,969.79 = 7,637.54 : x
  2. Step 2: Convert to fraction form
    8,688.47/12,969.79 = 7,637.54/x
  3. Step 3: Cross multiply
    8,688.47x = 12,969.79 × 7,637.54
  4. Step 4: Simplify right side
    8,688.47x = 99,057,205.97
  5. Step 5: Solve for x
    x = 99,057,205.97/8,688.47
  6. Step 6: Final answer
    x = 11,401.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.