Home / 30,985.15-42,758.58-16,838.02

Finding the Fourth Proportional to 30,985.15, 42,758.58 and 16,838.02

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Solution

The fourth proportional to 30,985.15, 42,758.58 and 16,838.02 is: 23,235.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,985.15 : 42,758.58 = 16,838.02 : x
  2. Step 2: Convert to fraction form
    30,985.15/42,758.58 = 16,838.02/x
  3. Step 3: Cross multiply
    30,985.15x = 42,758.58 × 16,838.02
  4. Step 4: Simplify right side
    30,985.15x = 719,969,825.21
  5. Step 5: Solve for x
    x = 719,969,825.21/30,985.15
  6. Step 6: Final answer
    x = 23,235.96

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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.