Home / 30,985.50-42,758.82-16,838.04

Finding the Fourth Proportional to 30,985.50, 42,758.82 and 16,838.04

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Solution

The fourth proportional to 30,985.50, 42,758.82 and 16,838.04 is: 23,235.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,985.50 : 42,758.82 = 16,838.04 : x
  2. Step 2: Convert to fraction form
    30,985.50/42,758.82 = 16,838.04/x
  3. Step 3: Cross multiply
    30,985.50x = 42,758.82 × 16,838.04
  4. Step 4: Simplify right side
    30,985.50x = 719,974,721.51
  5. Step 5: Solve for x
    x = 719,974,721.51/30,985.50
  6. Step 6: Final answer
    x = 23,235.86

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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.