Home / 11,117.70-15,342.35-7,140.33

Finding the Fourth Proportional to 11,117.70, 15,342.35 and 7,140.33

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Solution

The fourth proportional to 11,117.70, 15,342.35 and 7,140.33 is: 9,853.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,117.70 : 15,342.35 = 7,140.33 : x
  2. Step 2: Convert to fraction form
    11,117.70/15,342.35 = 7,140.33/x
  3. Step 3: Cross multiply
    11,117.70x = 15,342.35 × 7,140.33
  4. Step 4: Simplify right side
    11,117.70x = 109,549,406.27
  5. Step 5: Solve for x
    x = 109,549,406.27/11,117.70
  6. Step 6: Final answer
    x = 9,853.60

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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.