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Finding the Fourth Proportional to 21,666.64, 32,478.43 and 15,078.99

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Solution

The fourth proportional to 21,666.64, 32,478.43 and 15,078.99 is: 22,603.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,666.64 : 32,478.43 = 15,078.99 : x
  2. Step 2: Convert to fraction form
    21,666.64/32,478.43 = 15,078.99/x
  3. Step 3: Cross multiply
    21,666.64x = 32,478.43 × 15,078.99
  4. Step 4: Simplify right side
    21,666.64x = 489,741,758.79
  5. Step 5: Solve for x
    x = 489,741,758.79/21,666.64
  6. Step 6: Final answer
    x = 22,603.49

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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.