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Finding the Fourth Proportional to 14,154.90, 19,533.74 and 7,781.91

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Solution

The fourth proportional to 14,154.90, 19,533.74 and 7,781.91 is: 10,739.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,154.90 : 19,533.74 = 7,781.91 : x
  2. Step 2: Convert to fraction form
    14,154.90/19,533.74 = 7,781.91/x
  3. Step 3: Cross multiply
    14,154.90x = 19,533.74 × 7,781.91
  4. Step 4: Simplify right side
    14,154.90x = 152,009,806.64
  5. Step 5: Solve for x
    x = 152,009,806.64/14,154.90
  6. Step 6: Final answer
    x = 10,739.02

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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.