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Finding the Fourth Proportional to 9,990.54, 14,986.62 and 6,520.50

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Solution

The fourth proportional to 9,990.54, 14,986.62 and 6,520.50 is: 9,781.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.54 : 14,986.62 = 6,520.50 : x
  2. Step 2: Convert to fraction form
    9,990.54/14,986.62 = 6,520.50/x
  3. Step 3: Cross multiply
    9,990.54x = 14,986.62 × 6,520.50
  4. Step 4: Simplify right side
    9,990.54x = 97,720,255.71
  5. Step 5: Solve for x
    x = 97,720,255.71/9,990.54
  6. Step 6: Final answer
    x = 9,781.28

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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.