Home / 27,915.85-38,521.86-15,812.86

Finding the Fourth Proportional to 27,915.85, 38,521.86 and 15,812.86

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Solution

The fourth proportional to 27,915.85, 38,521.86 and 15,812.86 is: 21,820.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,915.85 : 38,521.86 = 15,812.86 : x
  2. Step 2: Convert to fraction form
    27,915.85/38,521.86 = 15,812.86/x
  3. Step 3: Cross multiply
    27,915.85x = 38,521.86 × 15,812.86
  4. Step 4: Simplify right side
    27,915.85x = 609,140,779.12
  5. Step 5: Solve for x
    x = 609,140,779.12/27,915.85
  6. Step 6: Final answer
    x = 21,820.61

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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.