Home / 39,877.12-55,030.16-21,971.72

Finding the Fourth Proportional to 39,877.12, 55,030.16 and 21,971.72

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Solution

The fourth proportional to 39,877.12, 55,030.16 and 21,971.72 is: 30,320.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,877.12 : 55,030.16 = 21,971.72 : x
  2. Step 2: Convert to fraction form
    39,877.12/55,030.16 = 21,971.72/x
  3. Step 3: Cross multiply
    39,877.12x = 55,030.16 × 21,971.72
  4. Step 4: Simplify right side
    39,877.12x = 1,209,107,267.08
  5. Step 5: Solve for x
    x = 1,209,107,267.08/39,877.12
  6. Step 6: Final answer
    x = 30,320.83

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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.