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Finding the Fourth Proportional to 28,613.10, 42,915.06 and 7,831.74

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Solution

The fourth proportional to 28,613.10, 42,915.06 and 7,831.74 is: 11,746.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,613.10 : 42,915.06 = 7,831.74 : x
  2. Step 2: Convert to fraction form
    28,613.10/42,915.06 = 7,831.74/x
  3. Step 3: Cross multiply
    28,613.10x = 42,915.06 × 7,831.74
  4. Step 4: Simplify right side
    28,613.10x = 336,099,592.00
  5. Step 5: Solve for x
    x = 336,099,592.00/28,613.10
  6. Step 6: Final answer
    x = 11,746.35

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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.