Home / 21,630.63-29,852.37-13,130.81

Finding the Fourth Proportional to 21,630.63, 29,852.37 and 13,130.81

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Solution

The fourth proportional to 21,630.63, 29,852.37 and 13,130.81 is: 18,121.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,630.63 : 29,852.37 = 13,130.81 : x
  2. Step 2: Convert to fraction form
    21,630.63/29,852.37 = 13,130.81/x
  3. Step 3: Cross multiply
    21,630.63x = 29,852.37 × 13,130.81
  4. Step 4: Simplify right side
    21,630.63x = 391,985,649.26
  5. Step 5: Solve for x
    x = 391,985,649.26/21,630.63
  6. Step 6: Final answer
    x = 18,121.79

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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.