Home / 21,247.09-31,792.02-12,818.48

Finding the Fourth Proportional to 21,247.09, 31,792.02 and 12,818.48

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Solution

The fourth proportional to 21,247.09, 31,792.02 and 12,818.48 is: 19,180.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,247.09 : 31,792.02 = 12,818.48 : x
  2. Step 2: Convert to fraction form
    21,247.09/31,792.02 = 12,818.48/x
  3. Step 3: Cross multiply
    21,247.09x = 31,792.02 × 12,818.48
  4. Step 4: Simplify right side
    21,247.09x = 407,525,165.50
  5. Step 5: Solve for x
    x = 407,525,165.50/21,247.09
  6. Step 6: Final answer
    x = 19,180.28

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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.