Home / 28,427.16-39,228.79-15,680.07

Finding the Fourth Proportional to 28,427.16, 39,228.79 and 15,680.07

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Solution

The fourth proportional to 28,427.16, 39,228.79 and 15,680.07 is: 21,638.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,427.16 : 39,228.79 = 15,680.07 : x
  2. Step 2: Convert to fraction form
    28,427.16/39,228.79 = 15,680.07/x
  3. Step 3: Cross multiply
    28,427.16x = 39,228.79 × 15,680.07
  4. Step 4: Simplify right side
    28,427.16x = 615,110,173.22
  5. Step 5: Solve for x
    x = 615,110,173.22/28,427.16
  6. Step 6: Final answer
    x = 21,638.12

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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.