Home / 21,995.08-30,358.80-12,569.20

Finding the Fourth Proportional to 21,995.08, 30,358.80 and 12,569.20

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Solution

The fourth proportional to 21,995.08, 30,358.80 and 12,569.20 is: 17,348.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,995.08 : 30,358.80 = 12,569.20 : x
  2. Step 2: Convert to fraction form
    21,995.08/30,358.80 = 12,569.20/x
  3. Step 3: Cross multiply
    21,995.08x = 30,358.80 × 12,569.20
  4. Step 4: Simplify right side
    21,995.08x = 381,585,828.96
  5. Step 5: Solve for x
    x = 381,585,828.96/21,995.08
  6. Step 6: Final answer
    x = 17,348.69

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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.