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Finding the Fourth Proportional to 21,703.60, 29,950.40 and 12,750.88

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Solution

The fourth proportional to 21,703.60, 29,950.40 and 12,750.88 is: 17,595.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,703.60 : 29,950.40 = 12,750.88 : x
  2. Step 2: Convert to fraction form
    21,703.60/29,950.40 = 12,750.88/x
  3. Step 3: Cross multiply
    21,703.60x = 29,950.40 × 12,750.88
  4. Step 4: Simplify right side
    21,703.60x = 381,893,956.35
  5. Step 5: Solve for x
    x = 381,893,956.35/21,703.60
  6. Step 6: Final answer
    x = 17,595.88

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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.