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Finding the Fourth Proportional to 21,000.95, 31,695.88 and 21,000.95

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Solution

The fourth proportional to 21,000.95, 31,695.88 and 21,000.95 is: 31,695.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.95 : 31,695.88 = 21,000.95 : x
  2. Step 2: Convert to fraction form
    21,000.95/31,695.88 = 21,000.95/x
  3. Step 3: Cross multiply
    21,000.95x = 31,695.88 × 21,000.95
  4. Step 4: Simplify right side
    21,000.95x = 665,643,591.09
  5. Step 5: Solve for x
    x = 665,643,591.09/21,000.95
  6. Step 6: Final answer
    x = 31,695.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.