Home / 20,434.16-28,200.35-15,389.48

Finding the Fourth Proportional to 20,434.16, 28,200.35 and 15,389.48

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Solution

The fourth proportional to 20,434.16, 28,200.35 and 15,389.48 is: 21,238.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,434.16 : 28,200.35 = 15,389.48 : x
  2. Step 2: Convert to fraction form
    20,434.16/28,200.35 = 15,389.48/x
  3. Step 3: Cross multiply
    20,434.16x = 28,200.35 × 15,389.48
  4. Step 4: Simplify right side
    20,434.16x = 433,988,722.32
  5. Step 5: Solve for x
    x = 433,988,722.32/20,434.16
  6. Step 6: Final answer
    x = 21,238.39

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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.