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Finding the Fourth Proportional to 15,030.94, 20,742.46 and 8,316.45

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Solution

The fourth proportional to 15,030.94, 20,742.46 and 8,316.45 is: 11,476.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,030.94 : 20,742.46 = 8,316.45 : x
  2. Step 2: Convert to fraction form
    15,030.94/20,742.46 = 8,316.45/x
  3. Step 3: Cross multiply
    15,030.94x = 20,742.46 × 8,316.45
  4. Step 4: Simplify right side
    15,030.94x = 172,503,631.47
  5. Step 5: Solve for x
    x = 172,503,631.47/15,030.94
  6. Step 6: Final answer
    x = 11,476.57

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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.