Home / 30,990.16-42,764.69-16,842.91

Finding the Fourth Proportional to 30,990.16, 42,764.69 and 16,842.91

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Solution

The fourth proportional to 30,990.16, 42,764.69 and 16,842.91 is: 23,242.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,990.16 : 42,764.69 = 16,842.91 : x
  2. Step 2: Convert to fraction form
    30,990.16/42,764.69 = 16,842.91/x
  3. Step 3: Cross multiply
    30,990.16x = 42,764.69 × 16,842.91
  4. Step 4: Simplify right side
    30,990.16x = 720,281,740.63
  5. Step 5: Solve for x
    x = 720,281,740.63/30,990.16
  6. Step 6: Final answer
    x = 23,242.27

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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.