Home / 19,231.20-28,809.40-12,637.52

Finding the Fourth Proportional to 19,231.20, 28,809.40 and 12,637.52

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Solution

The fourth proportional to 19,231.20, 28,809.40 and 12,637.52 is: 18,931.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,231.20 : 28,809.40 = 12,637.52 : x
  2. Step 2: Convert to fraction form
    19,231.20/28,809.40 = 12,637.52/x
  3. Step 3: Cross multiply
    19,231.20x = 28,809.40 × 12,637.52
  4. Step 4: Simplify right side
    19,231.20x = 364,079,368.69
  5. Step 5: Solve for x
    x = 364,079,368.69/19,231.20
  6. Step 6: Final answer
    x = 18,931.70

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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.