Home / 15,509.31-21,402.23-8,435.75

Finding the Fourth Proportional to 15,509.31, 21,402.23 and 8,435.75

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Solution

The fourth proportional to 15,509.31, 21,402.23 and 8,435.75 is: 11,640.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,509.31 : 21,402.23 = 8,435.75 : x
  2. Step 2: Convert to fraction form
    15,509.31/21,402.23 = 8,435.75/x
  3. Step 3: Cross multiply
    15,509.31x = 21,402.23 × 8,435.75
  4. Step 4: Simplify right side
    15,509.31x = 180,543,712.53
  5. Step 5: Solve for x
    x = 180,543,712.53/15,509.31
  6. Step 6: Final answer
    x = 11,640.99

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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.