Home / 20,693.81-30,980.87-18,557.23

Finding the Fourth Proportional to 20,693.81, 30,980.87 and 18,557.23

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Solution

The fourth proportional to 20,693.81, 30,980.87 and 18,557.23 is: 27,782.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,693.81 : 30,980.87 = 18,557.23 : x
  2. Step 2: Convert to fraction form
    20,693.81/30,980.87 = 18,557.23/x
  3. Step 3: Cross multiply
    20,693.81x = 30,980.87 × 18,557.23
  4. Step 4: Simplify right side
    20,693.81x = 574,919,130.19
  5. Step 5: Solve for x
    x = 574,919,130.19/20,693.81
  6. Step 6: Final answer
    x = 27,782.18

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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.