Home / 21,113.04-29,134.80-12,159.84

Finding the Fourth Proportional to 21,113.04, 29,134.80 and 12,159.84

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Solution

The fourth proportional to 21,113.04, 29,134.80 and 12,159.84 is: 16,779.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,113.04 : 29,134.80 = 12,159.84 : x
  2. Step 2: Convert to fraction form
    21,113.04/29,134.80 = 12,159.84/x
  3. Step 3: Cross multiply
    21,113.04x = 29,134.80 × 12,159.84
  4. Step 4: Simplify right side
    21,113.04x = 354,274,506.43
  5. Step 5: Solve for x
    x = 354,274,506.43/21,113.04
  6. Step 6: Final answer
    x = 16,779.89

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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.