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Finding the Fourth Proportional to 12,681.24, 17,502.93 and 7,971.90

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Solution

The fourth proportional to 12,681.24, 17,502.93 and 7,971.90 is: 11,002.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,681.24 : 17,502.93 = 7,971.90 : x
  2. Step 2: Convert to fraction form
    12,681.24/17,502.93 = 7,971.90/x
  3. Step 3: Cross multiply
    12,681.24x = 17,502.93 × 7,971.90
  4. Step 4: Simplify right side
    12,681.24x = 139,531,607.67
  5. Step 5: Solve for x
    x = 139,531,607.67/12,681.24
  6. Step 6: Final answer
    x = 11,002.99

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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.