Home / 10,969.79-15,138.31-6,190.75

Finding the Fourth Proportional to 10,969.79, 15,138.31 and 6,190.75

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Solution

The fourth proportional to 10,969.79, 15,138.31 and 6,190.75 is: 8,543.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,969.79 : 15,138.31 = 6,190.75 : x
  2. Step 2: Convert to fraction form
    10,969.79/15,138.31 = 6,190.75/x
  3. Step 3: Cross multiply
    10,969.79x = 15,138.31 × 6,190.75
  4. Step 4: Simplify right side
    10,969.79x = 93,717,492.63
  5. Step 5: Solve for x
    x = 93,717,492.63/10,969.79
  6. Step 6: Final answer
    x = 8,543.23

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Half scale
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Double scale
Find fourth proportional to 10,970.79, 15,139.69 and 6,191.75
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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.