Home / 28,319.79-39,083.36-15,746.43

Finding the Fourth Proportional to 28,319.79, 39,083.36 and 15,746.43

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Solution

The fourth proportional to 28,319.79, 39,083.36 and 15,746.43 is: 21,731.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,319.79 : 39,083.36 = 15,746.43 : x
  2. Step 2: Convert to fraction form
    28,319.79/39,083.36 = 15,746.43/x
  3. Step 3: Cross multiply
    28,319.79x = 39,083.36 × 15,746.43
  4. Step 4: Simplify right side
    28,319.79x = 615,423,313.67
  5. Step 5: Solve for x
    x = 615,423,313.67/28,319.79
  6. Step 6: Final answer
    x = 21,731.21

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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.