Home / 15,485.87-21,370.01-8,772.12

Finding the Fourth Proportional to 15,485.87, 21,370.01 and 8,772.12

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Solution

The fourth proportional to 15,485.87, 21,370.01 and 8,772.12 is: 12,105.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.87 : 21,370.01 = 8,772.12 : x
  2. Step 2: Convert to fraction form
    15,485.87/21,370.01 = 8,772.12/x
  3. Step 3: Cross multiply
    15,485.87x = 21,370.01 × 8,772.12
  4. Step 4: Simplify right side
    15,485.87x = 187,460,141.41
  5. Step 5: Solve for x
    x = 187,460,141.41/15,485.87
  6. Step 6: Final answer
    x = 12,105.24

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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.