Home / 13,077.78-18,047.45-7,109.45

Finding the Fourth Proportional to 13,077.78, 18,047.45 and 7,109.45

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Solution

The fourth proportional to 13,077.78, 18,047.45 and 7,109.45 is: 9,811.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,077.78 : 18,047.45 = 7,109.45 : x
  2. Step 2: Convert to fraction form
    13,077.78/18,047.45 = 7,109.45/x
  3. Step 3: Cross multiply
    13,077.78x = 18,047.45 × 7,109.45
  4. Step 4: Simplify right side
    13,077.78x = 128,307,488.52
  5. Step 5: Solve for x
    x = 128,307,488.52/13,077.78
  6. Step 6: Final answer
    x = 9,811.11

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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.