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Finding the Fourth Proportional to 15,266.70, 21,064.86 and 8,975.70

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Solution

The fourth proportional to 15,266.70, 21,064.86 and 8,975.70 is: 12,384.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,266.70 : 21,064.86 = 8,975.70 : x
  2. Step 2: Convert to fraction form
    15,266.70/21,064.86 = 8,975.70/x
  3. Step 3: Cross multiply
    15,266.70x = 21,064.86 × 8,975.70
  4. Step 4: Simplify right side
    15,266.70x = 189,071,863.90
  5. Step 5: Solve for x
    x = 189,071,863.90/15,266.70
  6. Step 6: Final answer
    x = 12,384.59

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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.