Home / 14,130.80-21,167.40-7,209.20

Finding the Fourth Proportional to 14,130.80, 21,167.40 and 7,209.20

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Solution

The fourth proportional to 14,130.80, 21,167.40 and 7,209.20 is: 10,799.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,130.80 : 21,167.40 = 7,209.20 : x
  2. Step 2: Convert to fraction form
    14,130.80/21,167.40 = 7,209.20/x
  3. Step 3: Cross multiply
    14,130.80x = 21,167.40 × 7,209.20
  4. Step 4: Simplify right side
    14,130.80x = 152,600,020.08
  5. Step 5: Solve for x
    x = 152,600,020.08/14,130.80
  6. Step 6: Final answer
    x = 10,799.11

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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.