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Finding the Fourth Proportional to 15,477.81, 21,358.78 and 8,762.10

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Solution

The fourth proportional to 15,477.81, 21,358.78 and 8,762.10 is: 12,091.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,477.81 : 21,358.78 = 8,762.10 : x
  2. Step 2: Convert to fraction form
    15,477.81/21,358.78 = 8,762.10/x
  3. Step 3: Cross multiply
    15,477.81x = 21,358.78 × 8,762.10
  4. Step 4: Simplify right side
    15,477.81x = 187,147,766.24
  5. Step 5: Solve for x
    x = 187,147,766.24/15,477.81
  6. Step 6: Final answer
    x = 12,091.36

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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.