Home / 30,915.76-42,663.84-16,768.72

Finding the Fourth Proportional to 30,915.76, 42,663.84 and 16,768.72

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Solution

The fourth proportional to 30,915.76, 42,663.84 and 16,768.72 is: 23,140.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,915.76 : 42,663.84 = 16,768.72 : x
  2. Step 2: Convert to fraction form
    30,915.76/42,663.84 = 16,768.72/x
  3. Step 3: Cross multiply
    30,915.76x = 42,663.84 × 16,768.72
  4. Step 4: Simplify right side
    30,915.76x = 715,417,987.08
  5. Step 5: Solve for x
    x = 715,417,987.08/30,915.76
  6. Step 6: Final answer
    x = 23,140.88

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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.