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Finding the Fourth Proportional to 42,609.40, 63,914.10 and 19,281.40

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Solution

The fourth proportional to 42,609.40, 63,914.10 and 19,281.40 is: 28,922.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,609.40 : 63,914.10 = 19,281.40 : x
  2. Step 2: Convert to fraction form
    42,609.40/63,914.10 = 19,281.40/x
  3. Step 3: Cross multiply
    42,609.40x = 63,914.10 × 19,281.40
  4. Step 4: Simplify right side
    42,609.40x = 1,232,353,327.74
  5. Step 5: Solve for x
    x = 1,232,353,327.74/42,609.40
  6. Step 6: Final answer
    x = 28,922.10

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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.