Home / 9,915.60-13,682.66-5,665.81

Finding the Fourth Proportional to 9,915.60, 13,682.66 and 5,665.81

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Solution

The fourth proportional to 9,915.60, 13,682.66 and 5,665.81 is: 7,818.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,915.60 : 13,682.66 = 5,665.81 : x
  2. Step 2: Convert to fraction form
    9,915.60/13,682.66 = 5,665.81/x
  3. Step 3: Cross multiply
    9,915.60x = 13,682.66 × 5,665.81
  4. Step 4: Simplify right side
    9,915.60x = 77,523,323.53
  5. Step 5: Solve for x
    x = 77,523,323.53/9,915.60
  6. Step 6: Final answer
    x = 7,818.32

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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.