Home / 28,425.74-39,225.31-15,679.40

Finding the Fourth Proportional to 28,425.74, 39,225.31 and 15,679.40

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Solution

The fourth proportional to 28,425.74, 39,225.31 and 15,679.40 is: 21,636.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,425.74 : 39,225.31 = 15,679.40 : x
  2. Step 2: Convert to fraction form
    28,425.74/39,225.31 = 15,679.40/x
  3. Step 3: Cross multiply
    28,425.74x = 39,225.31 × 15,679.40
  4. Step 4: Simplify right side
    28,425.74x = 615,029,090.29
  5. Step 5: Solve for x
    x = 615,029,090.29/28,425.74
  6. Step 6: Final answer
    x = 21,636.35

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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.