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Finding the Fourth Proportional to 8,663.80, 12,995.70 and 7,570.30

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Solution

The fourth proportional to 8,663.80, 12,995.70 and 7,570.30 is: 11,355.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,663.80 : 12,995.70 = 7,570.30 : x
  2. Step 2: Convert to fraction form
    8,663.80/12,995.70 = 7,570.30/x
  3. Step 3: Cross multiply
    8,663.80x = 12,995.70 × 7,570.30
  4. Step 4: Simplify right side
    8,663.80x = 98,381,347.71
  5. Step 5: Solve for x
    x = 98,381,347.71/8,663.80
  6. Step 6: Final answer
    x = 11,355.45

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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.