Home / 15,434.01-21,388.52-15,138.63

Finding the Fourth Proportional to 15,434.01, 21,388.52 and 15,138.63

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Solution

The fourth proportional to 15,434.01, 21,388.52 and 15,138.63 is: 20,979.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,434.01 : 21,388.52 = 15,138.63 : x
  2. Step 2: Convert to fraction form
    15,434.01/21,388.52 = 15,138.63/x
  3. Step 3: Cross multiply
    15,434.01x = 21,388.52 × 15,138.63
  4. Step 4: Simplify right side
    15,434.01x = 323,792,928.37
  5. Step 5: Solve for x
    x = 323,792,928.37/15,434.01
  6. Step 6: Final answer
    x = 20,979.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.