Home / 42,142.20-63,216.90-12,558.12

Finding the Fourth Proportional to 42,142.20, 63,216.90 and 12,558.12

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Solution

The fourth proportional to 42,142.20, 63,216.90 and 12,558.12 is: 18,838.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,142.20 : 63,216.90 = 12,558.12 : x
  2. Step 2: Convert to fraction form
    42,142.20/63,216.90 = 12,558.12/x
  3. Step 3: Cross multiply
    42,142.20x = 63,216.90 × 12,558.12
  4. Step 4: Simplify right side
    42,142.20x = 793,885,416.23
  5. Step 5: Solve for x
    x = 793,885,416.23/42,142.20
  6. Step 6: Final answer
    x = 18,838.25

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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.