Home / 20,343.08-28,071.84-11,388.50

Finding the Fourth Proportional to 20,343.08, 28,071.84 and 11,388.50

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Solution

The fourth proportional to 20,343.08, 28,071.84 and 11,388.50 is: 15,715.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.08 : 28,071.84 = 11,388.50 : x
  2. Step 2: Convert to fraction form
    20,343.08/28,071.84 = 11,388.50/x
  3. Step 3: Cross multiply
    20,343.08x = 28,071.84 × 11,388.50
  4. Step 4: Simplify right side
    20,343.08x = 319,696,149.84
  5. Step 5: Solve for x
    x = 319,696,149.84/20,343.08
  6. Step 6: Final answer
    x = 15,715.23

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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.