Home / 27,995.60-38,633-15,420.32

Finding the Fourth Proportional to 27,995.60, 38,633 and 15,420.32

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Solution

The fourth proportional to 27,995.60, 38,633 and 15,420.32 is: 21,279.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,995.60 : 38,633 = 15,420.32 : x
  2. Step 2: Convert to fraction form
    27,995.60/38,633 = 15,420.32/x
  3. Step 3: Cross multiply
    27,995.60x = 38,633 × 15,420.32
  4. Step 4: Simplify right side
    27,995.60x = 595,733,222.56
  5. Step 5: Solve for x
    x = 595,733,222.56/27,995.60
  6. Step 6: Final answer
    x = 21,279.53

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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.