Home / 20,746.76-31,120.12-6,718.50

Finding the Fourth Proportional to 20,746.76, 31,120.12 and 6,718.50

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Solution

The fourth proportional to 20,746.76, 31,120.12 and 6,718.50 is: 10,077.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,746.76 : 31,120.12 = 6,718.50 : x
  2. Step 2: Convert to fraction form
    20,746.76/31,120.12 = 6,718.50/x
  3. Step 3: Cross multiply
    20,746.76x = 31,120.12 × 6,718.50
  4. Step 4: Simplify right side
    20,746.76x = 209,080,526.22
  5. Step 5: Solve for x
    x = 209,080,526.22/20,746.76
  6. Step 6: Final answer
    x = 10,077.74

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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.