Home / 15,259.78-21,058.14-8,972.56

Finding the Fourth Proportional to 15,259.78, 21,058.14 and 8,972.56

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Solution

The fourth proportional to 15,259.78, 21,058.14 and 8,972.56 is: 12,381.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,259.78 : 21,058.14 = 8,972.56 : x
  2. Step 2: Convert to fraction form
    15,259.78/21,058.14 = 8,972.56/x
  3. Step 3: Cross multiply
    15,259.78x = 21,058.14 × 8,972.56
  4. Step 4: Simplify right side
    15,259.78x = 188,945,424.64
  5. Step 5: Solve for x
    x = 188,945,424.64/15,259.78
  6. Step 6: Final answer
    x = 12,381.92

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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.