Home / 42,272.40-63,409.77-12,690.25

Finding the Fourth Proportional to 42,272.40, 63,409.77 and 12,690.25

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Solution

The fourth proportional to 42,272.40, 63,409.77 and 12,690.25 is: 19,035.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,272.40 : 63,409.77 = 12,690.25 : x
  2. Step 2: Convert to fraction form
    42,272.40/63,409.77 = 12,690.25/x
  3. Step 3: Cross multiply
    42,272.40x = 63,409.77 × 12,690.25
  4. Step 4: Simplify right side
    42,272.40x = 804,685,675.22
  5. Step 5: Solve for x
    x = 804,685,675.22/42,272.40
  6. Step 6: Final answer
    x = 19,035.72

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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.