Home / 19,909.42-29,870.92-12,505.21

Finding the Fourth Proportional to 19,909.42, 29,870.92 and 12,505.21

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Solution

The fourth proportional to 19,909.42, 29,870.92 and 12,505.21 is: 18,762.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,909.42 : 29,870.92 = 12,505.21 : x
  2. Step 2: Convert to fraction form
    19,909.42/29,870.92 = 12,505.21/x
  3. Step 3: Cross multiply
    19,909.42x = 29,870.92 × 12,505.21
  4. Step 4: Simplify right side
    19,909.42x = 373,542,127.49
  5. Step 5: Solve for x
    x = 373,542,127.49/19,909.42
  6. Step 6: Final answer
    x = 18,762.08

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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.