Home / 11,436.30-15,780.19-6,721.50

Finding the Fourth Proportional to 11,436.30, 15,780.19 and 6,721.50

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Solution

The fourth proportional to 11,436.30, 15,780.19 and 6,721.50 is: 9,274.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,436.30 : 15,780.19 = 6,721.50 : x
  2. Step 2: Convert to fraction form
    11,436.30/15,780.19 = 6,721.50/x
  3. Step 3: Cross multiply
    11,436.30x = 15,780.19 × 6,721.50
  4. Step 4: Simplify right side
    11,436.30x = 106,066,547.09
  5. Step 5: Solve for x
    x = 106,066,547.09/11,436.30
  6. Step 6: Final answer
    x = 9,274.55

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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.