Home / 39,886.40-55,040.23-21,981.49

Finding the Fourth Proportional to 39,886.40, 55,040.23 and 21,981.49

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Solution

The fourth proportional to 39,886.40, 55,040.23 and 21,981.49 is: 30,332.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,886.40 : 55,040.23 = 21,981.49 : x
  2. Step 2: Convert to fraction form
    39,886.40/55,040.23 = 21,981.49/x
  3. Step 3: Cross multiply
    39,886.40x = 55,040.23 × 21,981.49
  4. Step 4: Simplify right side
    39,886.40x = 1,209,866,265.34
  5. Step 5: Solve for x
    x = 1,209,866,265.34/39,886.40
  6. Step 6: Final answer
    x = 30,332.80

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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.