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Finding the Fourth Proportional to 10,391, 14,339.66 and 5,675.28

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Solution

The fourth proportional to 10,391, 14,339.66 and 5,675.28 is: 7,831.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,391 : 14,339.66 = 5,675.28 : x
  2. Step 2: Convert to fraction form
    10,391/14,339.66 = 5,675.28/x
  3. Step 3: Cross multiply
    10,391x = 14,339.66 × 5,675.28
  4. Step 4: Simplify right side
    10,391x = 81,381,585.60
  5. Step 5: Solve for x
    x = 81,381,585.60/10,391
  6. Step 6: Final answer
    x = 7,831.93

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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.