Home / 21,018.79-31,528.50-9,009.37

Finding the Fourth Proportional to 21,018.79, 31,528.50 and 9,009.37

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Solution

The fourth proportional to 21,018.79, 31,528.50 and 9,009.37 is: 13,514.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.79 : 31,528.50 = 9,009.37 : x
  2. Step 2: Convert to fraction form
    21,018.79/31,528.50 = 9,009.37/x
  3. Step 3: Cross multiply
    21,018.79x = 31,528.50 × 9,009.37
  4. Step 4: Simplify right side
    21,018.79x = 284,051,922.05
  5. Step 5: Solve for x
    x = 284,051,922.05/21,018.79
  6. Step 6: Final answer
    x = 13,514.19

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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.