Home / 21,345.40-32,018.10-13,588.60

Finding the Fourth Proportional to 21,345.40, 32,018.10 and 13,588.60

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Solution

The fourth proportional to 21,345.40, 32,018.10 and 13,588.60 is: 20,382.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,345.40 : 32,018.10 = 13,588.60 : x
  2. Step 2: Convert to fraction form
    21,345.40/32,018.10 = 13,588.60/x
  3. Step 3: Cross multiply
    21,345.40x = 32,018.10 × 13,588.60
  4. Step 4: Simplify right side
    21,345.40x = 435,081,153.66
  5. Step 5: Solve for x
    x = 435,081,153.66/21,345.40
  6. Step 6: Final answer
    x = 20,382.90

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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.