Home / 28,355.22-39,141.18-18,920.34

Finding the Fourth Proportional to 28,355.22, 39,141.18 and 18,920.34

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Solution

The fourth proportional to 28,355.22, 39,141.18 and 18,920.34 is: 26,117.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,355.22 : 39,141.18 = 18,920.34 : x
  2. Step 2: Convert to fraction form
    28,355.22/39,141.18 = 18,920.34/x
  3. Step 3: Cross multiply
    28,355.22x = 39,141.18 × 18,920.34
  4. Step 4: Simplify right side
    28,355.22x = 740,564,433.60
  5. Step 5: Solve for x
    x = 740,564,433.60/28,355.22
  6. Step 6: Final answer
    x = 26,117.39

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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.