Home / 15,415.30-21,270.72-9,041.38

Finding the Fourth Proportional to 15,415.30, 21,270.72 and 9,041.38

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Solution

The fourth proportional to 15,415.30, 21,270.72 and 9,041.38 is: 12,475.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,415.30 : 21,270.72 = 9,041.38 : x
  2. Step 2: Convert to fraction form
    15,415.30/21,270.72 = 9,041.38/x
  3. Step 3: Cross multiply
    15,415.30x = 21,270.72 × 9,041.38
  4. Step 4: Simplify right side
    15,415.30x = 192,316,662.39
  5. Step 5: Solve for x
    x = 192,316,662.39/15,415.30
  6. Step 6: Final answer
    x = 12,475.70

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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.