Home / 28,280.34-39,025.80-15,705.90

Finding the Fourth Proportional to 28,280.34, 39,025.80 and 15,705.90

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Solution

The fourth proportional to 28,280.34, 39,025.80 and 15,705.90 is: 21,673.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,280.34 : 39,025.80 = 15,705.90 : x
  2. Step 2: Convert to fraction form
    28,280.34/39,025.80 = 15,705.90/x
  3. Step 3: Cross multiply
    28,280.34x = 39,025.80 × 15,705.90
  4. Step 4: Simplify right side
    28,280.34x = 612,935,312.22
  5. Step 5: Solve for x
    x = 612,935,312.22/28,280.34
  6. Step 6: Final answer
    x = 21,673.55

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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.