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Finding the Fourth Proportional to 21,007.95, 31,511.93 and 21,007.95

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Solution

The fourth proportional to 21,007.95, 31,511.93 and 21,007.95 is: 31,511.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.95 : 31,511.93 = 21,007.95 : x
  2. Step 2: Convert to fraction form
    21,007.95/31,511.93 = 21,007.95/x
  3. Step 3: Cross multiply
    21,007.95x = 31,511.93 × 21,007.95
  4. Step 4: Simplify right side
    21,007.95x = 662,000,944.80
  5. Step 5: Solve for x
    x = 662,000,944.80/21,007.95
  6. Step 6: Final answer
    x = 31,511.93

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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.