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Finding the Fourth Proportional to 8,670.85, 13,006.65 and 7,220.23

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Solution

The fourth proportional to 8,670.85, 13,006.65 and 7,220.23 is: 10,830.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,670.85 : 13,006.65 = 7,220.23 : x
  2. Step 2: Convert to fraction form
    8,670.85/13,006.65 = 7,220.23/x
  3. Step 3: Cross multiply
    8,670.85x = 13,006.65 × 7,220.23
  4. Step 4: Simplify right side
    8,670.85x = 93,911,004.53
  5. Step 5: Solve for x
    x = 93,911,004.53/8,670.85
  6. Step 6: Final answer
    x = 10,830.66

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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.