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Finding the Fourth Proportional to 15,630.51, 21,569.32 and 8,915.89

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Solution

The fourth proportional to 15,630.51, 21,569.32 and 8,915.89 is: 12,303.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,630.51 : 21,569.32 = 8,915.89 : x
  2. Step 2: Convert to fraction form
    15,630.51/21,569.32 = 8,915.89/x
  3. Step 3: Cross multiply
    15,630.51x = 21,569.32 × 8,915.89
  4. Step 4: Simplify right side
    15,630.51x = 192,309,608.28
  5. Step 5: Solve for x
    x = 192,309,608.28/15,630.51
  6. Step 6: Final answer
    x = 12,303.48

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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.