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Finding the Fourth Proportional to 15,802.85, 21,807.52 and 8,729.12

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Solution

The fourth proportional to 15,802.85, 21,807.52 and 8,729.12 is: 12,045.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,802.85 : 21,807.52 = 8,729.12 : x
  2. Step 2: Convert to fraction form
    15,802.85/21,807.52 = 8,729.12/x
  3. Step 3: Cross multiply
    15,802.85x = 21,807.52 × 8,729.12
  4. Step 4: Simplify right side
    15,802.85x = 190,360,491.68
  5. Step 5: Solve for x
    x = 190,360,491.68/15,802.85
  6. Step 6: Final answer
    x = 12,045.96

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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.