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Finding the Fourth Proportional to 15,874.67, 21,908.60 and 8,802.45

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Solution

The fourth proportional to 15,874.67, 21,908.60 and 8,802.45 is: 12,148.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,874.67 : 21,908.60 = 8,802.45 : x
  2. Step 2: Convert to fraction form
    15,874.67/21,908.60 = 8,802.45/x
  3. Step 3: Cross multiply
    15,874.67x = 21,908.60 × 8,802.45
  4. Step 4: Simplify right side
    15,874.67x = 192,849,312.06
  5. Step 5: Solve for x
    x = 192,849,312.06/15,874.67
  6. Step 6: Final answer
    x = 12,148.24

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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.