Home / 11,145.70-15,386.02-7,117.81

Finding the Fourth Proportional to 11,145.70, 15,386.02 and 7,117.81

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Solution

The fourth proportional to 11,145.70, 15,386.02 and 7,117.81 is: 9,825.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,145.70 : 15,386.02 = 7,117.81 : x
  2. Step 2: Convert to fraction form
    11,145.70/15,386.02 = 7,117.81/x
  3. Step 3: Cross multiply
    11,145.70x = 15,386.02 × 7,117.81
  4. Step 4: Simplify right side
    11,145.70x = 109,514,692.96
  5. Step 5: Solve for x
    x = 109,514,692.96/11,145.70
  6. Step 6: Final answer
    x = 9,825.73

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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.