Home / 30,985.84-42,758.94-16,838.20

Finding the Fourth Proportional to 30,985.84, 42,758.94 and 16,838.20

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Solution

The fourth proportional to 30,985.84, 42,758.94 and 16,838.20 is: 23,235.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,985.84 : 42,758.94 = 16,838.20 : x
  2. Step 2: Convert to fraction form
    30,985.84/42,758.94 = 16,838.20/x
  3. Step 3: Cross multiply
    30,985.84x = 42,758.94 × 16,838.20
  4. Step 4: Simplify right side
    30,985.84x = 719,983,583.51
  5. Step 5: Solve for x
    x = 719,983,583.51/30,985.84
  6. Step 6: Final answer
    x = 23,235.89

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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.