Home / 13,437.78-20,139.95-7,182.35

Finding the Fourth Proportional to 13,437.78, 20,139.95 and 7,182.35

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Solution

The fourth proportional to 13,437.78, 20,139.95 and 7,182.35 is: 10,764.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,437.78 : 20,139.95 = 7,182.35 : x
  2. Step 2: Convert to fraction form
    13,437.78/20,139.95 = 7,182.35/x
  3. Step 3: Cross multiply
    13,437.78x = 20,139.95 × 7,182.35
  4. Step 4: Simplify right side
    13,437.78x = 144,652,162.66
  5. Step 5: Solve for x
    x = 144,652,162.66/13,437.78
  6. Step 6: Final answer
    x = 10,764.59

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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.