Home / 27,639.86-38,143.05-15,703.22

Finding the Fourth Proportional to 27,639.86, 38,143.05 and 15,703.22

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Solution

The fourth proportional to 27,639.86, 38,143.05 and 15,703.22 is: 21,670.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,639.86 : 38,143.05 = 15,703.22 : x
  2. Step 2: Convert to fraction form
    27,639.86/38,143.05 = 15,703.22/x
  3. Step 3: Cross multiply
    27,639.86x = 38,143.05 × 15,703.22
  4. Step 4: Simplify right side
    27,639.86x = 598,968,705.62
  5. Step 5: Solve for x
    x = 598,968,705.62/27,639.86
  6. Step 6: Final answer
    x = 21,670.47

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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.