Home / 20,088.95-30,139.49-7,612.79

Finding the Fourth Proportional to 20,088.95, 30,139.49 and 7,612.79

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Solution

The fourth proportional to 20,088.95, 30,139.49 and 7,612.79 is: 11,421.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,088.95 : 30,139.49 = 7,612.79 : x
  2. Step 2: Convert to fraction form
    20,088.95/30,139.49 = 7,612.79/x
  3. Step 3: Cross multiply
    20,088.95x = 30,139.49 × 7,612.79
  4. Step 4: Simplify right side
    20,088.95x = 229,445,476.41
  5. Step 5: Solve for x
    x = 229,445,476.41/20,088.95
  6. Step 6: Final answer
    x = 11,421.48

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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.