Home / 20,430.92-28,202.62-12,875.77

Finding the Fourth Proportional to 20,430.92, 28,202.62 and 12,875.77

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Solution

The fourth proportional to 20,430.92, 28,202.62 and 12,875.77 is: 17,773.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.92 : 28,202.62 = 12,875.77 : x
  2. Step 2: Convert to fraction form
    20,430.92/28,202.62 = 12,875.77/x
  3. Step 3: Cross multiply
    20,430.92x = 28,202.62 × 12,875.77
  4. Step 4: Simplify right side
    20,430.92x = 363,130,394.11
  5. Step 5: Solve for x
    x = 363,130,394.11/20,430.92
  6. Step 6: Final answer
    x = 17,773.57

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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.