Home / 27,905.75-38,509.95-15,331.31

Finding the Fourth Proportional to 27,905.75, 38,509.95 and 15,331.31

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Solution

The fourth proportional to 27,905.75, 38,509.95 and 15,331.31 is: 21,157.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,905.75 : 38,509.95 = 15,331.31 : x
  2. Step 2: Convert to fraction form
    27,905.75/38,509.95 = 15,331.31/x
  3. Step 3: Cross multiply
    27,905.75x = 38,509.95 × 15,331.31
  4. Step 4: Simplify right side
    27,905.75x = 590,407,981.53
  5. Step 5: Solve for x
    x = 590,407,981.53/27,905.75
  6. Step 6: Final answer
    x = 21,157.22

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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.