Home / 15,509.07-21,402.43-8,435.54

Finding the Fourth Proportional to 15,509.07, 21,402.43 and 8,435.54

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Solution

The fourth proportional to 15,509.07, 21,402.43 and 8,435.54 is: 11,641.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,509.07 : 21,402.43 = 8,435.54 : x
  2. Step 2: Convert to fraction form
    15,509.07/21,402.43 = 8,435.54/x
  3. Step 3: Cross multiply
    15,509.07x = 21,402.43 × 8,435.54
  4. Step 4: Simplify right side
    15,509.07x = 180,541,086.78
  5. Step 5: Solve for x
    x = 180,541,086.78/15,509.07
  6. Step 6: Final answer
    x = 11,641.00

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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.