Home / 21,024.90-31,501.66-12,687.40

Finding the Fourth Proportional to 21,024.90, 31,501.66 and 12,687.40

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Solution

The fourth proportional to 21,024.90, 31,501.66 and 12,687.40 is: 19,009.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,024.90 : 31,501.66 = 12,687.40 : x
  2. Step 2: Convert to fraction form
    21,024.90/31,501.66 = 12,687.40/x
  3. Step 3: Cross multiply
    21,024.90x = 31,501.66 × 12,687.40
  4. Step 4: Simplify right side
    21,024.90x = 399,674,161.08
  5. Step 5: Solve for x
    x = 399,674,161.08/21,024.90
  6. Step 6: Final answer
    x = 19,009.56

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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.