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Finding the Fourth Proportional to 18,709.88, 28,050.11 and 9,345.07

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Solution

The fourth proportional to 18,709.88, 28,050.11 and 9,345.07 is: 14,010.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709.88 : 28,050.11 = 9,345.07 : x
  2. Step 2: Convert to fraction form
    18,709.88/28,050.11 = 9,345.07/x
  3. Step 3: Cross multiply
    18,709.88x = 28,050.11 × 9,345.07
  4. Step 4: Simplify right side
    18,709.88x = 262,130,054.48
  5. Step 5: Solve for x
    x = 262,130,054.48/18,709.88
  6. Step 6: Final answer
    x = 14,010.25

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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.