Home / 39,116.85-53,981.15-21,211.80

Finding the Fourth Proportional to 39,116.85, 53,981.15 and 21,211.80

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Solution

The fourth proportional to 39,116.85, 53,981.15 and 21,211.80 is: 29,272.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,116.85 : 53,981.15 = 21,211.80 : x
  2. Step 2: Convert to fraction form
    39,116.85/53,981.15 = 21,211.80/x
  3. Step 3: Cross multiply
    39,116.85x = 53,981.15 × 21,211.80
  4. Step 4: Simplify right side
    39,116.85x = 1,145,037,251.51
  5. Step 5: Solve for x
    x = 1,145,037,251.51/39,116.85
  6. Step 6: Final answer
    x = 29,272.23

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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.