Home / 15,328.21-21,153.07-9,278.59

Finding the Fourth Proportional to 15,328.21, 21,153.07 and 9,278.59

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Solution

The fourth proportional to 15,328.21, 21,153.07 and 9,278.59 is: 12,804.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,328.21 : 21,153.07 = 9,278.59 : x
  2. Step 2: Convert to fraction form
    15,328.21/21,153.07 = 9,278.59/x
  3. Step 3: Cross multiply
    15,328.21x = 21,153.07 × 9,278.59
  4. Step 4: Simplify right side
    15,328.21x = 196,270,511.61
  5. Step 5: Solve for x
    x = 196,270,511.61/15,328.21
  6. Step 6: Final answer
    x = 12,804.53

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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.