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Finding the Fourth Proportional to 15,903.66, 21,943.50 and 9,615.90

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Solution

The fourth proportional to 15,903.66, 21,943.50 and 9,615.90 is: 13,267.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,903.66 : 21,943.50 = 9,615.90 : x
  2. Step 2: Convert to fraction form
    15,903.66/21,943.50 = 9,615.90/x
  3. Step 3: Cross multiply
    15,903.66x = 21,943.50 × 9,615.90
  4. Step 4: Simplify right side
    15,903.66x = 211,006,501.65
  5. Step 5: Solve for x
    x = 211,006,501.65/15,903.66
  6. Step 6: Final answer
    x = 13,267.80

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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.