Home / 18,715.07-28,068.47-5,385.11

Finding the Fourth Proportional to 18,715.07, 28,068.47 and 5,385.11

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Solution

The fourth proportional to 18,715.07, 28,068.47 and 5,385.11 is: 8,076.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,715.07 : 28,068.47 = 5,385.11 : x
  2. Step 2: Convert to fraction form
    18,715.07/28,068.47 = 5,385.11/x
  3. Step 3: Cross multiply
    18,715.07x = 28,068.47 × 5,385.11
  4. Step 4: Simplify right side
    18,715.07x = 151,151,631.21
  5. Step 5: Solve for x
    x = 151,151,631.21/18,715.07
  6. Step 6: Final answer
    x = 8,076.47

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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.