Home / 27,657.16-38,167.86-15,721

Finding the Fourth Proportional to 27,657.16, 38,167.86 and 15,721

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Solution

The fourth proportional to 27,657.16, 38,167.86 and 15,721 is: 21,695.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,657.16 : 38,167.86 = 15,721 : x
  2. Step 2: Convert to fraction form
    27,657.16/38,167.86 = 15,721/x
  3. Step 3: Cross multiply
    27,657.16x = 38,167.86 × 15,721
  4. Step 4: Simplify right side
    27,657.16x = 600,036,927.06
  5. Step 5: Solve for x
    x = 600,036,927.06/27,657.16
  6. Step 6: Final answer
    x = 21,695.54

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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.