Home / 13,355.10-18,431.08-7,387.32

Finding the Fourth Proportional to 13,355.10, 18,431.08 and 7,387.32

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Solution

The fourth proportional to 13,355.10, 18,431.08 and 7,387.32 is: 10,195.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,355.10 : 18,431.08 = 7,387.32 : x
  2. Step 2: Convert to fraction form
    13,355.10/18,431.08 = 7,387.32/x
  3. Step 3: Cross multiply
    13,355.10x = 18,431.08 × 7,387.32
  4. Step 4: Simplify right side
    13,355.10x = 136,156,336.55
  5. Step 5: Solve for x
    x = 136,156,336.55/13,355.10
  6. Step 6: Final answer
    x = 10,195.08

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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.