Home / 13,756.48-18,969.60-8,166.40

Finding the Fourth Proportional to 13,756.48, 18,969.60 and 8,166.40

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Solution

The fourth proportional to 13,756.48, 18,969.60 and 8,166.40 is: 11,261.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,756.48 : 18,969.60 = 8,166.40 : x
  2. Step 2: Convert to fraction form
    13,756.48/18,969.60 = 8,166.40/x
  3. Step 3: Cross multiply
    13,756.48x = 18,969.60 × 8,166.40
  4. Step 4: Simplify right side
    13,756.48x = 154,913,341.44
  5. Step 5: Solve for x
    x = 154,913,341.44/13,756.48
  6. Step 6: Final answer
    x = 11,261.12

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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.