Home / 15,012.95-20,717.50-8,298.40

Finding the Fourth Proportional to 15,012.95, 20,717.50 and 8,298.40

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Solution

The fourth proportional to 15,012.95, 20,717.50 and 8,298.40 is: 11,451.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,012.95 : 20,717.50 = 8,298.40 : x
  2. Step 2: Convert to fraction form
    15,012.95/20,717.50 = 8,298.40/x
  3. Step 3: Cross multiply
    15,012.95x = 20,717.50 × 8,298.40
  4. Step 4: Simplify right side
    15,012.95x = 171,922,143.46
  5. Step 5: Solve for x
    x = 171,922,143.46/15,012.95
  6. Step 6: Final answer
    x = 11,451.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.