Home / 21,131.20-31,702.80-10,588.51

Finding the Fourth Proportional to 21,131.20, 31,702.80 and 10,588.51

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Solution

The fourth proportional to 21,131.20, 31,702.80 and 10,588.51 is: 15,885.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.20 : 31,702.80 = 10,588.51 : x
  2. Step 2: Convert to fraction form
    21,131.20/31,702.80 = 10,588.51/x
  3. Step 3: Cross multiply
    21,131.20x = 31,702.80 × 10,588.51
  4. Step 4: Simplify right side
    21,131.20x = 335,685,256.31
  5. Step 5: Solve for x
    x = 335,685,256.31/21,131.20
  6. Step 6: Final answer
    x = 15,885.77

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1.5x scale

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.