Home / 20,948.42-31,420.71-8,464.91

Finding the Fourth Proportional to 20,948.42, 31,420.71 and 8,464.91

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Solution

The fourth proportional to 20,948.42, 31,420.71 and 8,464.91 is: 12,696.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.42 : 31,420.71 = 8,464.91 : x
  2. Step 2: Convert to fraction form
    20,948.42/31,420.71 = 8,464.91/x
  3. Step 3: Cross multiply
    20,948.42x = 31,420.71 × 8,464.91
  4. Step 4: Simplify right side
    20,948.42x = 265,973,325.18
  5. Step 5: Solve for x
    x = 265,973,325.18/20,948.42
  6. Step 6: Final answer
    x = 12,696.58

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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.