Home / 30,492-45,690.77-21,150.18

Finding the Fourth Proportional to 30,492, 45,690.77 and 21,150.18

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Solution

The fourth proportional to 30,492, 45,690.77 and 21,150.18 is: 31,692.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,492 : 45,690.77 = 21,150.18 : x
  2. Step 2: Convert to fraction form
    30,492/45,690.77 = 21,150.18/x
  3. Step 3: Cross multiply
    30,492x = 45,690.77 × 21,150.18
  4. Step 4: Simplify right side
    30,492x = 966,367,904.09
  5. Step 5: Solve for x
    x = 966,367,904.09/30,492
  6. Step 6: Final answer
    x = 31,692.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.