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Finding the Fourth Proportional to 20,699.40, 31,045.02 and 5,904.30

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Solution

The fourth proportional to 20,699.40, 31,045.02 and 5,904.30 is: 8,855.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,699.40 : 31,045.02 = 5,904.30 : x
  2. Step 2: Convert to fraction form
    20,699.40/31,045.02 = 5,904.30/x
  3. Step 3: Cross multiply
    20,699.40x = 31,045.02 × 5,904.30
  4. Step 4: Simplify right side
    20,699.40x = 183,299,111.59
  5. Step 5: Solve for x
    x = 183,299,111.59/20,699.40
  6. Step 6: Final answer
    x = 8,855.29

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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.