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Finding the Fourth Proportional to 34,065.87, 46,988.96 and 21,981.78

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Solution

The fourth proportional to 34,065.87, 46,988.96 and 21,981.78 is: 30,320.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,065.87 : 46,988.96 = 21,981.78 : x
  2. Step 2: Convert to fraction form
    34,065.87/46,988.96 = 21,981.78/x
  3. Step 3: Cross multiply
    34,065.87x = 46,988.96 × 21,981.78
  4. Step 4: Simplify right side
    34,065.87x = 1,032,900,994.89
  5. Step 5: Solve for x
    x = 1,032,900,994.89/34,065.87
  6. Step 6: Final answer
    x = 30,320.70

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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.