Home / 21,201.80-29,267.70-13,752.20

Finding the Fourth Proportional to 21,201.80, 29,267.70 and 13,752.20

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Solution

The fourth proportional to 21,201.80, 29,267.70 and 13,752.20 is: 18,984.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,201.80 : 29,267.70 = 13,752.20 : x
  2. Step 2: Convert to fraction form
    21,201.80/29,267.70 = 13,752.20/x
  3. Step 3: Cross multiply
    21,201.80x = 29,267.70 × 13,752.20
  4. Step 4: Simplify right side
    21,201.80x = 402,495,263.94
  5. Step 5: Solve for x
    x = 402,495,263.94/21,201.80
  6. Step 6: Final answer
    x = 18,984.01

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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.