Home / 15,328.66-21,153.74-9,278.82

Finding the Fourth Proportional to 15,328.66, 21,153.74 and 9,278.82

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Solution

The fourth proportional to 15,328.66, 21,153.74 and 9,278.82 is: 12,804.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,328.66 : 21,153.74 = 9,278.82 : x
  2. Step 2: Convert to fraction form
    15,328.66/21,153.74 = 9,278.82/x
  3. Step 3: Cross multiply
    15,328.66x = 21,153.74 × 9,278.82
  4. Step 4: Simplify right side
    15,328.66x = 196,281,751.59
  5. Step 5: Solve for x
    x = 196,281,751.59/15,328.66
  6. Step 6: Final answer
    x = 12,804.89

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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.