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Finding the Fourth Proportional to 17,988.50, 26,990.56 and 9,658.80

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Solution

The fourth proportional to 17,988.50, 26,990.56 and 9,658.80 is: 14,492.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,988.50 : 26,990.56 = 9,658.80 : x
  2. Step 2: Convert to fraction form
    17,988.50/26,990.56 = 9,658.80/x
  3. Step 3: Cross multiply
    17,988.50x = 26,990.56 × 9,658.80
  4. Step 4: Simplify right side
    17,988.50x = 260,696,420.93
  5. Step 5: Solve for x
    x = 260,696,420.93/17,988.50
  6. Step 6: Final answer
    x = 14,492.39

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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.