Home / 15,455.87-21,328.98-8,382.29

Finding the Fourth Proportional to 15,455.87, 21,328.98 and 8,382.29

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Solution

The fourth proportional to 15,455.87, 21,328.98 and 8,382.29 is: 11,567.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,455.87 : 21,328.98 = 8,382.29 : x
  2. Step 2: Convert to fraction form
    15,455.87/21,328.98 = 8,382.29/x
  3. Step 3: Cross multiply
    15,455.87x = 21,328.98 × 8,382.29
  4. Step 4: Simplify right side
    15,455.87x = 178,785,695.76
  5. Step 5: Solve for x
    x = 178,785,695.76/15,455.87
  6. Step 6: Final answer
    x = 11,567.49

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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.