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Finding the Fourth Proportional to 15,698.66, 21,664.08 and 8,984.25

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Solution

The fourth proportional to 15,698.66, 21,664.08 and 8,984.25 is: 12,398.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,698.66 : 21,664.08 = 8,984.25 : x
  2. Step 2: Convert to fraction form
    15,698.66/21,664.08 = 8,984.25/x
  3. Step 3: Cross multiply
    15,698.66x = 21,664.08 × 8,984.25
  4. Step 4: Simplify right side
    15,698.66x = 194,635,510.74
  5. Step 5: Solve for x
    x = 194,635,510.74/15,698.66
  6. Step 6: Final answer
    x = 12,398.23

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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.