Home / 21,159.15-31,740.83-7,835.71

Finding the Fourth Proportional to 21,159.15, 31,740.83 and 7,835.71

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Solution

The fourth proportional to 21,159.15, 31,740.83 and 7,835.71 is: 11,754.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,159.15 : 31,740.83 = 7,835.71 : x
  2. Step 2: Convert to fraction form
    21,159.15/31,740.83 = 7,835.71/x
  3. Step 3: Cross multiply
    21,159.15x = 31,740.83 × 7,835.71
  4. Step 4: Simplify right side
    21,159.15x = 248,711,939.04
  5. Step 5: Solve for x
    x = 248,711,939.04/21,159.15
  6. Step 6: Final answer
    x = 11,754.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.