Home / 20,828.32-31,081.04-18,965.68

Finding the Fourth Proportional to 20,828.32, 31,081.04 and 18,965.68

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Solution

The fourth proportional to 20,828.32, 31,081.04 and 18,965.68 is: 28,301.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.32 : 31,081.04 = 18,965.68 : x
  2. Step 2: Convert to fraction form
    20,828.32/31,081.04 = 18,965.68/x
  3. Step 3: Cross multiply
    20,828.32x = 31,081.04 × 18,965.68
  4. Step 4: Simplify right side
    20,828.32x = 589,473,058.71
  5. Step 5: Solve for x
    x = 589,473,058.71/20,828.32
  6. Step 6: Final answer
    x = 28,301.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.