Home / 28,427.36-39,228.84-15,680.51

Finding the Fourth Proportional to 28,427.36, 39,228.84 and 15,680.51

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Solution

The fourth proportional to 28,427.36, 39,228.84 and 15,680.51 is: 21,638.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,427.36 : 39,228.84 = 15,680.51 : x
  2. Step 2: Convert to fraction form
    28,427.36/39,228.84 = 15,680.51/x
  3. Step 3: Cross multiply
    28,427.36x = 39,228.84 × 15,680.51
  4. Step 4: Simplify right side
    28,427.36x = 615,128,217.91
  5. Step 5: Solve for x
    x = 615,128,217.91/28,427.36
  6. Step 6: Final answer
    x = 21,638.60

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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.