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Finding the Fourth Proportional to 15,573.50, 21,491.45 and 9,984.50

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Solution

The fourth proportional to 15,573.50, 21,491.45 and 9,984.50 is: 13,778.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,573.50 : 21,491.45 = 9,984.50 : x
  2. Step 2: Convert to fraction form
    15,573.50/21,491.45 = 9,984.50/x
  3. Step 3: Cross multiply
    15,573.50x = 21,491.45 × 9,984.50
  4. Step 4: Simplify right side
    15,573.50x = 214,581,382.53
  5. Step 5: Solve for x
    x = 214,581,382.53/15,573.50
  6. Step 6: Final answer
    x = 13,778.62

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1.5x scale

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.