Home / 27,905.70-38,509.86-15,330.45

Finding the Fourth Proportional to 27,905.70, 38,509.86 and 15,330.45

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Solution

The fourth proportional to 27,905.70, 38,509.86 and 15,330.45 is: 21,156.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,905.70 : 38,509.86 = 15,330.45 : x
  2. Step 2: Convert to fraction form
    27,905.70/38,509.86 = 15,330.45/x
  3. Step 3: Cross multiply
    27,905.70x = 38,509.86 × 15,330.45
  4. Step 4: Simplify right side
    27,905.70x = 590,373,483.24
  5. Step 5: Solve for x
    x = 590,373,483.24/27,905.70
  6. Step 6: Final answer
    x = 21,156.02

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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.