Home / 27,819.48-38,390.16-15,555

Finding the Fourth Proportional to 27,819.48, 38,390.16 and 15,555

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Solution

The fourth proportional to 27,819.48, 38,390.16 and 15,555 is: 21,465.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,819.48 : 38,390.16 = 15,555 : x
  2. Step 2: Convert to fraction form
    27,819.48/38,390.16 = 15,555/x
  3. Step 3: Cross multiply
    27,819.48x = 38,390.16 × 15,555
  4. Step 4: Simplify right side
    27,819.48x = 597,158,938.80
  5. Step 5: Solve for x
    x = 597,158,938.80/27,819.48
  6. Step 6: Final answer
    x = 21,465.50

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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.