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Finding the Fourth Proportional to 18,994.80, 28,492.20 and 18,703.20

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Solution

The fourth proportional to 18,994.80, 28,492.20 and 18,703.20 is: 28,054.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,994.80 : 28,492.20 = 18,703.20 : x
  2. Step 2: Convert to fraction form
    18,994.80/28,492.20 = 18,703.20/x
  3. Step 3: Cross multiply
    18,994.80x = 28,492.20 × 18,703.20
  4. Step 4: Simplify right side
    18,994.80x = 532,895,315.04
  5. Step 5: Solve for x
    x = 532,895,315.04/18,994.80
  6. Step 6: Final answer
    x = 28,054.80

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1.5x scale

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.