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Finding the Fourth Proportional to 47,011.91, 70,472.90 and 17,421.80

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Solution

The fourth proportional to 47,011.91, 70,472.90 and 17,421.80 is: 26,116.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,011.91 : 70,472.90 = 17,421.80 : x
  2. Step 2: Convert to fraction form
    47,011.91/70,472.90 = 17,421.80/x
  3. Step 3: Cross multiply
    47,011.91x = 70,472.90 × 17,421.80
  4. Step 4: Simplify right side
    47,011.91x = 1,227,764,460.41
  5. Step 5: Solve for x
    x = 1,227,764,460.41/47,011.91
  6. Step 6: Final answer
    x = 26,116.03

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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.