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Finding the Fourth Proportional to 18,920.96, 26,085.48 and 13,248.08

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Solution

The fourth proportional to 18,920.96, 26,085.48 and 13,248.08 is: 18,264.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.96 : 26,085.48 = 13,248.08 : x
  2. Step 2: Convert to fraction form
    18,920.96/26,085.48 = 13,248.08/x
  3. Step 3: Cross multiply
    18,920.96x = 26,085.48 × 13,248.08
  4. Step 4: Simplify right side
    18,920.96x = 345,582,525.88
  5. Step 5: Solve for x
    x = 345,582,525.88/18,920.96
  6. Step 6: Final answer
    x = 18,264.53

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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.