Home / 14,121.40-21,182.10-13,538.20

Finding the Fourth Proportional to 14,121.40, 21,182.10 and 13,538.20

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Solution

The fourth proportional to 14,121.40, 21,182.10 and 13,538.20 is: 20,307.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,121.40 : 21,182.10 = 13,538.20 : x
  2. Step 2: Convert to fraction form
    14,121.40/21,182.10 = 13,538.20/x
  3. Step 3: Cross multiply
    14,121.40x = 21,182.10 × 13,538.20
  4. Step 4: Simplify right side
    14,121.40x = 286,767,506.22
  5. Step 5: Solve for x
    x = 286,767,506.22/14,121.40
  6. Step 6: Final answer
    x = 20,307.30

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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.