Home / 20,929.19-31,398.71-6,890.30

Finding the Fourth Proportional to 20,929.19, 31,398.71 and 6,890.30

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Solution

The fourth proportional to 20,929.19, 31,398.71 and 6,890.30 is: 10,337.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.19 : 31,398.71 = 6,890.30 : x
  2. Step 2: Convert to fraction form
    20,929.19/31,398.71 = 6,890.30/x
  3. Step 3: Cross multiply
    20,929.19x = 31,398.71 × 6,890.30
  4. Step 4: Simplify right side
    20,929.19x = 216,346,457.81
  5. Step 5: Solve for x
    x = 216,346,457.81/20,929.19
  6. Step 6: Final answer
    x = 10,337.07

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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.