Home / 30,915.22-42,615.66-18,956.38

Finding the Fourth Proportional to 30,915.22, 42,615.66 and 18,956.38

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Solution

The fourth proportional to 30,915.22, 42,615.66 and 18,956.38 is: 26,130.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,915.22 : 42,615.66 = 18,956.38 : x
  2. Step 2: Convert to fraction form
    30,915.22/42,615.66 = 18,956.38/x
  3. Step 3: Cross multiply
    30,915.22x = 42,615.66 × 18,956.38
  4. Step 4: Simplify right side
    30,915.22x = 807,838,644.91
  5. Step 5: Solve for x
    x = 807,838,644.91/30,915.22
  6. Step 6: Final answer
    x = 26,130.77

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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.