Home / 31,691.70-47,459.79-21,271.86

Finding the Fourth Proportional to 31,691.70, 47,459.79 and 21,271.86

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Solution

The fourth proportional to 31,691.70, 47,459.79 and 21,271.86 is: 31,855.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,691.70 : 47,459.79 = 21,271.86 : x
  2. Step 2: Convert to fraction form
    31,691.70/47,459.79 = 21,271.86/x
  3. Step 3: Cross multiply
    31,691.70x = 47,459.79 × 21,271.86
  4. Step 4: Simplify right side
    31,691.70x = 1,009,558,008.51
  5. Step 5: Solve for x
    x = 1,009,558,008.51/31,691.70
  6. Step 6: Final answer
    x = 31,855.60

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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.