Home / 13,638.51-18,831.74-10,649.16

Finding the Fourth Proportional to 13,638.51, 18,831.74 and 10,649.16

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Solution

The fourth proportional to 13,638.51, 18,831.74 and 10,649.16 is: 14,704.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.51 : 18,831.74 = 10,649.16 : x
  2. Step 2: Convert to fraction form
    13,638.51/18,831.74 = 10,649.16/x
  3. Step 3: Cross multiply
    13,638.51x = 18,831.74 × 10,649.16
  4. Step 4: Simplify right side
    13,638.51x = 200,542,159.09
  5. Step 5: Solve for x
    x = 200,542,159.09/13,638.51
  6. Step 6: Final answer
    x = 14,704.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.