Home / 20,281.08-27,990.54-11,898.36

Finding the Fourth Proportional to 20,281.08, 27,990.54 and 11,898.36

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Solution

The fourth proportional to 20,281.08, 27,990.54 and 11,898.36 is: 16,421.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.08 : 27,990.54 = 11,898.36 : x
  2. Step 2: Convert to fraction form
    20,281.08/27,990.54 = 11,898.36/x
  3. Step 3: Cross multiply
    20,281.08x = 27,990.54 × 11,898.36
  4. Step 4: Simplify right side
    20,281.08x = 333,041,521.51
  5. Step 5: Solve for x
    x = 333,041,521.51/20,281.08
  6. Step 6: Final answer
    x = 16,421.29

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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.