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Finding the Fourth Proportional to 30,644.98, 42,294.99 and 28,643.87

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Solution

The fourth proportional to 30,644.98, 42,294.99 and 28,643.87 is: 39,533.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,644.98 : 42,294.99 = 28,643.87 : x
  2. Step 2: Convert to fraction form
    30,644.98/42,294.99 = 28,643.87/x
  3. Step 3: Cross multiply
    30,644.98x = 42,294.99 × 28,643.87
  4. Step 4: Simplify right side
    30,644.98x = 1,211,492,195.21
  5. Step 5: Solve for x
    x = 1,211,492,195.21/30,644.98
  6. Step 6: Final answer
    x = 39,533.14

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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.