Home / 12,780.03-19,145.40-10,442.67

Finding the Fourth Proportional to 12,780.03, 19,145.40 and 10,442.67

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Solution

The fourth proportional to 12,780.03, 19,145.40 and 10,442.67 is: 15,643.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.03 : 19,145.40 = 10,442.67 : x
  2. Step 2: Convert to fraction form
    12,780.03/19,145.40 = 10,442.67/x
  3. Step 3: Cross multiply
    12,780.03x = 19,145.40 × 10,442.67
  4. Step 4: Simplify right side
    12,780.03x = 199,929,094.22
  5. Step 5: Solve for x
    x = 199,929,094.22/12,780.03
  6. Step 6: Final answer
    x = 15,643.87

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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.