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Finding the Fourth Proportional to 15,370.65, 21,212.00 and 8,656.38

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Solution

The fourth proportional to 15,370.65, 21,212.00 and 8,656.38 is: 11,946.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,370.65 : 21,212.00 = 8,656.38 : x
  2. Step 2: Convert to fraction form
    15,370.65/21,212.00 = 8,656.38/x
  3. Step 3: Cross multiply
    15,370.65x = 21,212.00 × 8,656.38
  4. Step 4: Simplify right side
    15,370.65x = 183,619,089.28
  5. Step 5: Solve for x
    x = 183,619,089.28/15,370.65
  6. Step 6: Final answer
    x = 11,946.08

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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.