Home / 31,030.48-42,842.28-20,438.11

Finding the Fourth Proportional to 31,030.48, 42,842.28 and 20,438.11

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Solution

The fourth proportional to 31,030.48, 42,842.28 and 20,438.11 is: 28,217.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,030.48 : 42,842.28 = 20,438.11 : x
  2. Step 2: Convert to fraction form
    31,030.48/42,842.28 = 20,438.11/x
  3. Step 3: Cross multiply
    31,030.48x = 42,842.28 × 20,438.11
  4. Step 4: Simplify right side
    31,030.48x = 875,615,231.29
  5. Step 5: Solve for x
    x = 875,615,231.29/31,030.48
  6. Step 6: Final answer
    x = 28,217.91

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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.