Home / 21,319.92-29,264.94-18,909.36

Finding the Fourth Proportional to 21,319.92, 29,264.94 and 18,909.36

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Solution

The fourth proportional to 21,319.92, 29,264.94 and 18,909.36 is: 25,956.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.92 : 29,264.94 = 18,909.36 : x
  2. Step 2: Convert to fraction form
    21,319.92/29,264.94 = 18,909.36/x
  3. Step 3: Cross multiply
    21,319.92x = 29,264.94 × 18,909.36
  4. Step 4: Simplify right side
    21,319.92x = 553,381,285.84
  5. Step 5: Solve for x
    x = 553,381,285.84/21,319.92
  6. Step 6: Final answer
    x = 25,956.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.