Home / 15,509.76-21,403.68-8,436.48

Finding the Fourth Proportional to 15,509.76, 21,403.68 and 8,436.48

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Solution

The fourth proportional to 15,509.76, 21,403.68 and 8,436.48 is: 11,642.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,509.76 : 21,403.68 = 8,436.48 : x
  2. Step 2: Convert to fraction form
    15,509.76/21,403.68 = 8,436.48/x
  3. Step 3: Cross multiply
    15,509.76x = 21,403.68 × 8,436.48
  4. Step 4: Simplify right side
    15,509.76x = 180,571,718.25
  5. Step 5: Solve for x
    x = 180,571,718.25/15,509.76
  6. Step 6: Final answer
    x = 11,642.46

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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.