Home / 39,115.61-53,979.40-21,210.57

Finding the Fourth Proportional to 39,115.61, 53,979.40 and 21,210.57

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Solution

The fourth proportional to 39,115.61, 53,979.40 and 21,210.57 is: 29,270.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,115.61 : 53,979.40 = 21,210.57 : x
  2. Step 2: Convert to fraction form
    39,115.61/53,979.40 = 21,210.57/x
  3. Step 3: Cross multiply
    39,115.61x = 53,979.40 × 21,210.57
  4. Step 4: Simplify right side
    39,115.61x = 1,144,933,868.77
  5. Step 5: Solve for x
    x = 1,144,933,868.77/39,115.61
  6. Step 6: Final answer
    x = 29,270.51

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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.