Home / 21,990.58-30,345.49-14,031.92

Finding the Fourth Proportional to 21,990.58, 30,345.49 and 14,031.92

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Solution

The fourth proportional to 21,990.58, 30,345.49 and 14,031.92 is: 19,363.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.58 : 30,345.49 = 14,031.92 : x
  2. Step 2: Convert to fraction form
    21,990.58/30,345.49 = 14,031.92/x
  3. Step 3: Cross multiply
    21,990.58x = 30,345.49 × 14,031.92
  4. Step 4: Simplify right side
    21,990.58x = 425,805,488.04
  5. Step 5: Solve for x
    x = 425,805,488.04/21,990.58
  6. Step 6: Final answer
    x = 19,363.09

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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.