Home / 27,656.32-38,169-15,721.45

Finding the Fourth Proportional to 27,656.32, 38,169 and 15,721.45

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Solution

The fourth proportional to 27,656.32, 38,169 and 15,721.45 is: 21,697.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,656.32 : 38,169 = 15,721.45 : x
  2. Step 2: Convert to fraction form
    27,656.32/38,169 = 15,721.45/x
  3. Step 3: Cross multiply
    27,656.32x = 38,169 × 15,721.45
  4. Step 4: Simplify right side
    27,656.32x = 600,072,025.05
  5. Step 5: Solve for x
    x = 600,072,025.05/27,656.32
  6. Step 6: Final answer
    x = 21,697.46

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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.