Home / 18,388.90-25,375.95-10,005.40

Finding the Fourth Proportional to 18,388.90, 25,375.95 and 10,005.40

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Solution

The fourth proportional to 18,388.90, 25,375.95 and 10,005.40 is: 13,807.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,388.90 : 25,375.95 = 10,005.40 : x
  2. Step 2: Convert to fraction form
    18,388.90/25,375.95 = 10,005.40/x
  3. Step 3: Cross multiply
    18,388.90x = 25,375.95 × 10,005.40
  4. Step 4: Simplify right side
    18,388.90x = 253,896,530.13
  5. Step 5: Solve for x
    x = 253,896,530.13/18,388.90
  6. Step 6: Final answer
    x = 13,807.05

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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.