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Finding the Fourth Proportional to 8,782.80, 12,125.52 and 7,007.28

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Solution

The fourth proportional to 8,782.80, 12,125.52 and 7,007.28 is: 9,674.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,782.80 : 12,125.52 = 7,007.28 : x
  2. Step 2: Convert to fraction form
    8,782.80/12,125.52 = 7,007.28/x
  3. Step 3: Cross multiply
    8,782.80x = 12,125.52 × 7,007.28
  4. Step 4: Simplify right side
    8,782.80x = 84,966,913.79
  5. Step 5: Solve for x
    x = 84,966,913.79/8,782.80
  6. Step 6: Final answer
    x = 9,674.24

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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.