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Finding the Fourth Proportional to 15,357.16, 21,192.42 and 8,643.16

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Solution

The fourth proportional to 15,357.16, 21,192.42 and 8,643.16 is: 11,927.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,357.16 : 21,192.42 = 8,643.16 : x
  2. Step 2: Convert to fraction form
    15,357.16/21,192.42 = 8,643.16/x
  3. Step 3: Cross multiply
    15,357.16x = 21,192.42 × 8,643.16
  4. Step 4: Simplify right side
    15,357.16x = 183,169,476.85
  5. Step 5: Solve for x
    x = 183,169,476.85/15,357.16
  6. Step 6: Final answer
    x = 11,927.30

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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.