Home / 20,799.40-31,156.86-15,810.52

Finding the Fourth Proportional to 20,799.40, 31,156.86 and 15,810.52

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Solution

The fourth proportional to 20,799.40, 31,156.86 and 15,810.52 is: 23,683.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,799.40 : 31,156.86 = 15,810.52 : x
  2. Step 2: Convert to fraction form
    20,799.40/31,156.86 = 15,810.52/x
  3. Step 3: Cross multiply
    20,799.40x = 31,156.86 × 15,810.52
  4. Step 4: Simplify right side
    20,799.40x = 492,606,158.17
  5. Step 5: Solve for x
    x = 492,606,158.17/20,799.40
  6. Step 6: Final answer
    x = 23,683.67

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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.