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Finding the Fourth Proportional to 21,658.79, 32,492.78 and 6,865.76

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Solution

The fourth proportional to 21,658.79, 32,492.78 and 6,865.76 is: 10,300.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,658.79 : 32,492.78 = 6,865.76 : x
  2. Step 2: Convert to fraction form
    21,658.79/32,492.78 = 6,865.76/x
  3. Step 3: Cross multiply
    21,658.79x = 32,492.78 × 6,865.76
  4. Step 4: Simplify right side
    21,658.79x = 223,087,629.21
  5. Step 5: Solve for x
    x = 223,087,629.21/21,658.79
  6. Step 6: Final answer
    x = 10,300.10

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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.