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Finding the Fourth Proportional to 21,641.40, 32,461.38 and 6,648.48

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Solution

The fourth proportional to 21,641.40, 32,461.38 and 6,648.48 is: 9,972.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,641.40 : 32,461.38 = 6,648.48 : x
  2. Step 2: Convert to fraction form
    21,641.40/32,461.38 = 6,648.48/x
  3. Step 3: Cross multiply
    21,641.40x = 32,461.38 × 6,648.48
  4. Step 4: Simplify right side
    21,641.40x = 215,818,835.70
  5. Step 5: Solve for x
    x = 215,818,835.70/21,641.40
  6. Step 6: Final answer
    x = 9,972.50

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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.