Home / 20,570.80-28,434.36-18,937.84

Finding the Fourth Proportional to 20,570.80, 28,434.36 and 18,937.84

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Solution

The fourth proportional to 20,570.80, 28,434.36 and 18,937.84 is: 26,177.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,570.80 : 28,434.36 = 18,937.84 : x
  2. Step 2: Convert to fraction form
    20,570.80/28,434.36 = 18,937.84/x
  3. Step 3: Cross multiply
    20,570.80x = 28,434.36 × 18,937.84
  4. Step 4: Simplify right side
    20,570.80x = 538,485,360.18
  5. Step 5: Solve for x
    x = 538,485,360.18/20,570.80
  6. Step 6: Final answer
    x = 26,177.17

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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.