Home / 20,870.96-31,298.66-8,386.76

Finding the Fourth Proportional to 20,870.96, 31,298.66 and 8,386.76

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Solution

The fourth proportional to 20,870.96, 31,298.66 and 8,386.76 is: 12,577.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.96 : 31,298.66 = 8,386.76 : x
  2. Step 2: Convert to fraction form
    20,870.96/31,298.66 = 8,386.76/x
  3. Step 3: Cross multiply
    20,870.96x = 31,298.66 × 8,386.76
  4. Step 4: Simplify right side
    20,870.96x = 262,494,305.89
  5. Step 5: Solve for x
    x = 262,494,305.89/20,870.96
  6. Step 6: Final answer
    x = 12,577.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.