Home / 28,395.20-39,143.36-18,185.16

Finding the Fourth Proportional to 28,395.20, 39,143.36 and 18,185.16

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Solution

The fourth proportional to 28,395.20, 39,143.36 and 18,185.16 is: 25,068.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,395.20 : 39,143.36 = 18,185.16 : x
  2. Step 2: Convert to fraction form
    28,395.20/39,143.36 = 18,185.16/x
  3. Step 3: Cross multiply
    28,395.20x = 39,143.36 × 18,185.16
  4. Step 4: Simplify right side
    28,395.20x = 711,828,264.54
  5. Step 5: Solve for x
    x = 711,828,264.54/28,395.20
  6. Step 6: Final answer
    x = 25,068.61

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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.