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Finding the Fourth Proportional to 21,966.80, 32,953.40 and 7,176.40

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Solution

The fourth proportional to 21,966.80, 32,953.40 and 7,176.40 is: 10,765.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,966.80 : 32,953.40 = 7,176.40 : x
  2. Step 2: Convert to fraction form
    21,966.80/32,953.40 = 7,176.40/x
  3. Step 3: Cross multiply
    21,966.80x = 32,953.40 × 7,176.40
  4. Step 4: Simplify right side
    21,966.80x = 236,486,779.76
  5. Step 5: Solve for x
    x = 236,486,779.76/21,966.80
  6. Step 6: Final answer
    x = 10,765.65

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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.