Home / 20,518.84-28,316.02-11,087.40

Finding the Fourth Proportional to 20,518.84, 28,316.02 and 11,087.40

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Solution

The fourth proportional to 20,518.84, 28,316.02 and 11,087.40 is: 15,300.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.84 : 28,316.02 = 11,087.40 : x
  2. Step 2: Convert to fraction form
    20,518.84/28,316.02 = 11,087.40/x
  3. Step 3: Cross multiply
    20,518.84x = 28,316.02 × 11,087.40
  4. Step 4: Simplify right side
    20,518.84x = 313,951,118.61
  5. Step 5: Solve for x
    x = 313,951,118.61/20,518.84
  6. Step 6: Final answer
    x = 15,300.63

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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.