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Finding the Fourth Proportional to 14,290.74, 19,720.45 and 7,917.14

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Solution

The fourth proportional to 14,290.74, 19,720.45 and 7,917.14 is: 10,925.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,290.74 : 19,720.45 = 7,917.14 : x
  2. Step 2: Convert to fraction form
    14,290.74/19,720.45 = 7,917.14/x
  3. Step 3: Cross multiply
    14,290.74x = 19,720.45 × 7,917.14
  4. Step 4: Simplify right side
    14,290.74x = 156,129,563.51
  5. Step 5: Solve for x
    x = 156,129,563.51/14,290.74
  6. Step 6: Final answer
    x = 10,925.23

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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.