Home / 19,913.60-29,834.40-15,780.80

Finding the Fourth Proportional to 19,913.60, 29,834.40 and 15,780.80

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Solution

The fourth proportional to 19,913.60, 29,834.40 and 15,780.80 is: 23,642.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,913.60 : 29,834.40 = 15,780.80 : x
  2. Step 2: Convert to fraction form
    19,913.60/29,834.40 = 15,780.80/x
  3. Step 3: Cross multiply
    19,913.60x = 29,834.40 × 15,780.80
  4. Step 4: Simplify right side
    19,913.60x = 470,810,699.52
  5. Step 5: Solve for x
    x = 470,810,699.52/19,913.60
  6. Step 6: Final answer
    x = 23,642.67

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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.