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Finding the Fourth Proportional to 15,655.21, 21,605.68 and 8,941.84

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Solution

The fourth proportional to 15,655.21, 21,605.68 and 8,941.84 is: 12,340.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,655.21 : 21,605.68 = 8,941.84 : x
  2. Step 2: Convert to fraction form
    15,655.21/21,605.68 = 8,941.84/x
  3. Step 3: Cross multiply
    15,655.21x = 21,605.68 × 8,941.84
  4. Step 4: Simplify right side
    15,655.21x = 193,194,490.81
  5. Step 5: Solve for x
    x = 193,194,490.81/15,655.21
  6. Step 6: Final answer
    x = 12,340.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.