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Finding the Fourth Proportional to 21,102.84, 29,094.53 and 13,130.82

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Solution

The fourth proportional to 21,102.84, 29,094.53 and 13,130.82 is: 18,103.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.84 : 29,094.53 = 13,130.82 : x
  2. Step 2: Convert to fraction form
    21,102.84/29,094.53 = 13,130.82/x
  3. Step 3: Cross multiply
    21,102.84x = 29,094.53 × 13,130.82
  4. Step 4: Simplify right side
    21,102.84x = 382,034,970.76
  5. Step 5: Solve for x
    x = 382,034,970.76/21,102.84
  6. Step 6: Final answer
    x = 18,103.49

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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.