Home / 20,335.78-28,048.88-12,378.51

Finding the Fourth Proportional to 20,335.78, 28,048.88 and 12,378.51

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Solution

The fourth proportional to 20,335.78, 28,048.88 and 12,378.51 is: 17,073.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,335.78 : 28,048.88 = 12,378.51 : x
  2. Step 2: Convert to fraction form
    20,335.78/28,048.88 = 12,378.51/x
  3. Step 3: Cross multiply
    20,335.78x = 28,048.88 × 12,378.51
  4. Step 4: Simplify right side
    20,335.78x = 347,203,372.52
  5. Step 5: Solve for x
    x = 347,203,372.52/20,335.78
  6. Step 6: Final answer
    x = 17,073.52

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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.