Home / 13,077.90-18,047.80-7,109.88

Finding the Fourth Proportional to 13,077.90, 18,047.80 and 7,109.88

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Solution

The fourth proportional to 13,077.90, 18,047.80 and 7,109.88 is: 9,811.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,077.90 : 18,047.80 = 7,109.88 : x
  2. Step 2: Convert to fraction form
    13,077.90/18,047.80 = 7,109.88/x
  3. Step 3: Cross multiply
    13,077.90x = 18,047.80 × 7,109.88
  4. Step 4: Simplify right side
    13,077.90x = 128,317,692.26
  5. Step 5: Solve for x
    x = 128,317,692.26/13,077.90
  6. Step 6: Final answer
    x = 9,811.80

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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.