Home / 21,985.38-30,345.35-12,559.41

Finding the Fourth Proportional to 21,985.38, 30,345.35 and 12,559.41

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Solution

The fourth proportional to 21,985.38, 30,345.35 and 12,559.41 is: 17,335.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985.38 : 30,345.35 = 12,559.41 : x
  2. Step 2: Convert to fraction form
    21,985.38/30,345.35 = 12,559.41/x
  3. Step 3: Cross multiply
    21,985.38x = 30,345.35 × 12,559.41
  4. Step 4: Simplify right side
    21,985.38x = 381,119,571.92
  5. Step 5: Solve for x
    x = 381,119,571.92/21,985.38
  6. Step 6: Final answer
    x = 17,335.14

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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.