Home / 27,985.36-38,587.80-20,899.84

Finding the Fourth Proportional to 27,985.36, 38,587.80 and 20,899.84

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Solution

The fourth proportional to 27,985.36, 38,587.80 and 20,899.84 is: 28,817.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,985.36 : 38,587.80 = 20,899.84 : x
  2. Step 2: Convert to fraction form
    27,985.36/38,587.80 = 20,899.84/x
  3. Step 3: Cross multiply
    27,985.36x = 38,587.80 × 20,899.84
  4. Step 4: Simplify right side
    27,985.36x = 806,478,845.95
  5. Step 5: Solve for x
    x = 806,478,845.95/27,985.36
  6. Step 6: Final answer
    x = 28,817.88

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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.