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Finding the Fourth Proportional to 16,686.84, 25,038.76 and 7,921.84

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Solution

The fourth proportional to 16,686.84, 25,038.76 and 7,921.84 is: 11,886.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,686.84 : 25,038.76 = 7,921.84 : x
  2. Step 2: Convert to fraction form
    16,686.84/25,038.76 = 7,921.84/x
  3. Step 3: Cross multiply
    16,686.84x = 25,038.76 × 7,921.84
  4. Step 4: Simplify right side
    16,686.84x = 198,353,050.52
  5. Step 5: Solve for x
    x = 198,353,050.52/16,686.84
  6. Step 6: Final answer
    x = 11,886.80

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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.