Home / 18,723.95-28,070.70-12,785.87

Finding the Fourth Proportional to 18,723.95, 28,070.70 and 12,785.87

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Solution

The fourth proportional to 18,723.95, 28,070.70 and 12,785.87 is: 19,168.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,723.95 : 28,070.70 = 12,785.87 : x
  2. Step 2: Convert to fraction form
    18,723.95/28,070.70 = 12,785.87/x
  3. Step 3: Cross multiply
    18,723.95x = 28,070.70 × 12,785.87
  4. Step 4: Simplify right side
    18,723.95x = 358,908,180.66
  5. Step 5: Solve for x
    x = 358,908,180.66/18,723.95
  6. Step 6: Final answer
    x = 19,168.40

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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.