Home / 15,886.35-21,878.78-15,541.97

Finding the Fourth Proportional to 15,886.35, 21,878.78 and 15,541.97

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Solution

The fourth proportional to 15,886.35, 21,878.78 and 15,541.97 is: 21,404.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,886.35 : 21,878.78 = 15,541.97 : x
  2. Step 2: Convert to fraction form
    15,886.35/21,878.78 = 15,541.97/x
  3. Step 3: Cross multiply
    15,886.35x = 21,878.78 × 15,541.97
  4. Step 4: Simplify right side
    15,886.35x = 340,039,155.29
  5. Step 5: Solve for x
    x = 340,039,155.29/15,886.35
  6. Step 6: Final answer
    x = 21,404.49

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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.