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Finding the Fourth Proportional to 14,789.81, 20,405.03 and 9,756.51

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Solution

The fourth proportional to 14,789.81, 20,405.03 and 9,756.51 is: 13,460.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,789.81 : 20,405.03 = 9,756.51 : x
  2. Step 2: Convert to fraction form
    14,789.81/20,405.03 = 9,756.51/x
  3. Step 3: Cross multiply
    14,789.81x = 20,405.03 × 9,756.51
  4. Step 4: Simplify right side
    14,789.81x = 199,081,830.46
  5. Step 5: Solve for x
    x = 199,081,830.46/14,789.81
  6. Step 6: Final answer
    x = 13,460.75

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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.