Home / 20,374.07-28,106.19-12,402.45

Finding the Fourth Proportional to 20,374.07, 28,106.19 and 12,402.45

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Solution

The fourth proportional to 20,374.07, 28,106.19 and 12,402.45 is: 17,109.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,374.07 : 28,106.19 = 12,402.45 : x
  2. Step 2: Convert to fraction form
    20,374.07/28,106.19 = 12,402.45/x
  3. Step 3: Cross multiply
    20,374.07x = 28,106.19 × 12,402.45
  4. Step 4: Simplify right side
    20,374.07x = 348,585,616.17
  5. Step 5: Solve for x
    x = 348,585,616.17/20,374.07
  6. Step 6: Final answer
    x = 17,109.28

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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.