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Finding the Fourth Proportional to 29,297.80, 40,430.95 and 15,869.32

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Solution

The fourth proportional to 29,297.80, 40,430.95 and 15,869.32 is: 21,899.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,297.80 : 40,430.95 = 15,869.32 : x
  2. Step 2: Convert to fraction form
    29,297.80/40,430.95 = 15,869.32/x
  3. Step 3: Cross multiply
    29,297.80x = 40,430.95 × 15,869.32
  4. Step 4: Simplify right side
    29,297.80x = 641,611,542.70
  5. Step 5: Solve for x
    x = 641,611,542.70/29,297.80
  6. Step 6: Final answer
    x = 21,899.65

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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.