Home / 20,927.08-28,869.78-13,371.40

Finding the Fourth Proportional to 20,927.08, 28,869.78 and 13,371.40

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Solution

The fourth proportional to 20,927.08, 28,869.78 and 13,371.40 is: 18,446.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,927.08 : 28,869.78 = 13,371.40 : x
  2. Step 2: Convert to fraction form
    20,927.08/28,869.78 = 13,371.40/x
  3. Step 3: Cross multiply
    20,927.08x = 28,869.78 × 13,371.40
  4. Step 4: Simplify right side
    20,927.08x = 386,029,376.29
  5. Step 5: Solve for x
    x = 386,029,376.29/20,927.08
  6. Step 6: Final answer
    x = 18,446.40

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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.