Home / 42,138.23-63,216.47-12,558.45

Finding the Fourth Proportional to 42,138.23, 63,216.47 and 12,558.45

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Solution

The fourth proportional to 42,138.23, 63,216.47 and 12,558.45 is: 18,840.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,138.23 : 63,216.47 = 12,558.45 : x
  2. Step 2: Convert to fraction form
    42,138.23/63,216.47 = 12,558.45/x
  3. Step 3: Cross multiply
    42,138.23x = 63,216.47 × 12,558.45
  4. Step 4: Simplify right side
    42,138.23x = 793,900,498.80
  5. Step 5: Solve for x
    x = 793,900,498.80/42,138.23
  6. Step 6: Final answer
    x = 18,840.39

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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.