Home / 15,009.31-20,715.42-8,725.33

Finding the Fourth Proportional to 15,009.31, 20,715.42 and 8,725.33

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Solution

The fourth proportional to 15,009.31, 20,715.42 and 8,725.33 is: 12,042.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,009.31 : 20,715.42 = 8,725.33 : x
  2. Step 2: Convert to fraction form
    15,009.31/20,715.42 = 8,725.33/x
  3. Step 3: Cross multiply
    15,009.31x = 20,715.42 × 8,725.33
  4. Step 4: Simplify right side
    15,009.31x = 180,748,875.59
  5. Step 5: Solve for x
    x = 180,748,875.59/15,009.31
  6. Step 6: Final answer
    x = 12,042.45

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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.