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Finding the Fourth Proportional to 15,393.74, 21,242.08 and 8,681.02

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Solution

The fourth proportional to 15,393.74, 21,242.08 and 8,681.02 is: 11,979.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,393.74 : 21,242.08 = 8,681.02 : x
  2. Step 2: Convert to fraction form
    15,393.74/21,242.08 = 8,681.02/x
  3. Step 3: Cross multiply
    15,393.74x = 21,242.08 × 8,681.02
  4. Step 4: Simplify right side
    15,393.74x = 184,402,921.32
  5. Step 5: Solve for x
    x = 184,402,921.32/15,393.74
  6. Step 6: Final answer
    x = 11,979.09

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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.