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Finding the Fourth Proportional to 18,953.84, 28,416.08 and 12,703.84

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Solution

The fourth proportional to 18,953.84, 28,416.08 and 12,703.84 is: 19,045.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,953.84 : 28,416.08 = 12,703.84 : x
  2. Step 2: Convert to fraction form
    18,953.84/28,416.08 = 12,703.84/x
  3. Step 3: Cross multiply
    18,953.84x = 28,416.08 × 12,703.84
  4. Step 4: Simplify right side
    18,953.84x = 360,993,333.75
  5. Step 5: Solve for x
    x = 360,993,333.75/18,953.84
  6. Step 6: Final answer
    x = 19,045.92

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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.