Home / 20,909.10-31,407.40-17,628.60

Finding the Fourth Proportional to 20,909.10, 31,407.40 and 17,628.60

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Solution

The fourth proportional to 20,909.10, 31,407.40 and 17,628.60 is: 26,479.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.10 : 31,407.40 = 17,628.60 : x
  2. Step 2: Convert to fraction form
    20,909.10/31,407.40 = 17,628.60/x
  3. Step 3: Cross multiply
    20,909.10x = 31,407.40 × 17,628.60
  4. Step 4: Simplify right side
    20,909.10x = 553,668,491.64
  5. Step 5: Solve for x
    x = 553,668,491.64/20,909.10
  6. Step 6: Final answer
    x = 26,479.79

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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.