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Finding the Fourth Proportional to 15,274.40, 21,077.52 and 8,986.40

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Solution

The fourth proportional to 15,274.40, 21,077.52 and 8,986.40 is: 12,400.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,274.40 : 21,077.52 = 8,986.40 : x
  2. Step 2: Convert to fraction form
    15,274.40/21,077.52 = 8,986.40/x
  3. Step 3: Cross multiply
    15,274.40x = 21,077.52 × 8,986.40
  4. Step 4: Simplify right side
    15,274.40x = 189,411,025.73
  5. Step 5: Solve for x
    x = 189,411,025.73/15,274.40
  6. Step 6: Final answer
    x = 12,400.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.