Home / 15,928.32-21,916.80-15,521.28

Finding the Fourth Proportional to 15,928.32, 21,916.80 and 15,521.28

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Solution

The fourth proportional to 15,928.32, 21,916.80 and 15,521.28 is: 21,356.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,928.32 : 21,916.80 = 15,521.28 : x
  2. Step 2: Convert to fraction form
    15,928.32/21,916.80 = 15,521.28/x
  3. Step 3: Cross multiply
    15,928.32x = 21,916.80 × 15,521.28
  4. Step 4: Simplify right side
    15,928.32x = 340,176,789.50
  5. Step 5: Solve for x
    x = 340,176,789.50/15,928.32
  6. Step 6: Final answer
    x = 21,356.73

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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.