Home / 28,971.80-43,407.30-13,357.40

Finding the Fourth Proportional to 28,971.80, 43,407.30 and 13,357.40

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Solution

The fourth proportional to 28,971.80, 43,407.30 and 13,357.40 is: 20,012.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,971.80 : 43,407.30 = 13,357.40 : x
  2. Step 2: Convert to fraction form
    28,971.80/43,407.30 = 13,357.40/x
  3. Step 3: Cross multiply
    28,971.80x = 43,407.30 × 13,357.40
  4. Step 4: Simplify right side
    28,971.80x = 579,808,669.02
  5. Step 5: Solve for x
    x = 579,808,669.02/28,971.80
  6. Step 6: Final answer
    x = 20,012.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.