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Finding the Fourth Proportional to 57,492, 86,238 and 15,939

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Solution

The fourth proportional to 57,492, 86,238 and 15,939 is: 23,908.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,492 : 86,238 = 15,939 : x
  2. Step 2: Convert to fraction form
    57,492/86,238 = 15,939/x
  3. Step 3: Cross multiply
    57,492x = 86,238 × 15,939
  4. Step 4: Simplify right side
    57,492x = 1,374,547,482
  5. Step 5: Solve for x
    x = 1,374,547,482/57,492
  6. Step 6: Final answer
    x = 23,908.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.