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Finding the Fourth Proportional to 10,653.90, 15,980.31 and 4,079.58

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Solution

The fourth proportional to 10,653.90, 15,980.31 and 4,079.58 is: 6,119.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,653.90 : 15,980.31 = 4,079.58 : x
  2. Step 2: Convert to fraction form
    10,653.90/15,980.31 = 4,079.58/x
  3. Step 3: Cross multiply
    10,653.90x = 15,980.31 × 4,079.58
  4. Step 4: Simplify right side
    10,653.90x = 65,192,953.07
  5. Step 5: Solve for x
    x = 65,192,953.07/10,653.90
  6. Step 6: Final answer
    x = 6,119.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.