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Finding the Fourth Proportional to 28,989.90, 43,489.71 and 9,266.40

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Solution

The fourth proportional to 28,989.90, 43,489.71 and 9,266.40 is: 13,901.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,989.90 : 43,489.71 = 9,266.40 : x
  2. Step 2: Convert to fraction form
    28,989.90/43,489.71 = 9,266.40/x
  3. Step 3: Cross multiply
    28,989.90x = 43,489.71 × 9,266.40
  4. Step 4: Simplify right side
    28,989.90x = 402,993,048.74
  5. Step 5: Solve for x
    x = 402,993,048.74/28,989.90
  6. Step 6: Final answer
    x = 13,901.15

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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.