Home / 21,168.14-31,752.65-7,128.59

Finding the Fourth Proportional to 21,168.14, 31,752.65 and 7,128.59

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Solution

The fourth proportional to 21,168.14, 31,752.65 and 7,128.59 is: 10,693.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,168.14 : 31,752.65 = 7,128.59 : x
  2. Step 2: Convert to fraction form
    21,168.14/31,752.65 = 7,128.59/x
  3. Step 3: Cross multiply
    21,168.14x = 31,752.65 × 7,128.59
  4. Step 4: Simplify right side
    21,168.14x = 226,351,482.32
  5. Step 5: Solve for x
    x = 226,351,482.32/21,168.14
  6. Step 6: Final answer
    x = 10,693.03

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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.