Home / 15,911.58-21,962.70-9,939.72

Finding the Fourth Proportional to 15,911.58, 21,962.70 and 9,939.72

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Solution

The fourth proportional to 15,911.58, 21,962.70 and 9,939.72 is: 13,719.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,911.58 : 21,962.70 = 9,939.72 : x
  2. Step 2: Convert to fraction form
    15,911.58/21,962.70 = 9,939.72/x
  3. Step 3: Cross multiply
    15,911.58x = 21,962.70 × 9,939.72
  4. Step 4: Simplify right side
    15,911.58x = 218,303,088.44
  5. Step 5: Solve for x
    x = 218,303,088.44/15,911.58
  6. Step 6: Final answer
    x = 13,719.76

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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.