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Finding the Fourth Proportional to 15,875.56, 21,907.56 and 9,162.38

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Solution

The fourth proportional to 15,875.56, 21,907.56 and 9,162.38 is: 12,643.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,875.56 : 21,907.56 = 9,162.38 : x
  2. Step 2: Convert to fraction form
    15,875.56/21,907.56 = 9,162.38/x
  3. Step 3: Cross multiply
    15,875.56x = 21,907.56 × 9,162.38
  4. Step 4: Simplify right side
    15,875.56x = 200,725,389.59
  5. Step 5: Solve for x
    x = 200,725,389.59/15,875.56
  6. Step 6: Final answer
    x = 12,643.67

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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.