Home / 13,378.04-18,461.64-7,712.75

Finding the Fourth Proportional to 13,378.04, 18,461.64 and 7,712.75

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Solution

The fourth proportional to 13,378.04, 18,461.64 and 7,712.75 is: 10,643.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,378.04 : 18,461.64 = 7,712.75 : x
  2. Step 2: Convert to fraction form
    13,378.04/18,461.64 = 7,712.75/x
  3. Step 3: Cross multiply
    13,378.04x = 18,461.64 × 7,712.75
  4. Step 4: Simplify right side
    13,378.04x = 142,389,921.60
  5. Step 5: Solve for x
    x = 142,389,921.60/13,378.04
  6. Step 6: Final answer
    x = 10,643.56

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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.