Home / 20,875.81-31,199.10-15,265.30

Finding the Fourth Proportional to 20,875.81, 31,199.10 and 15,265.30

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Solution

The fourth proportional to 20,875.81, 31,199.10 and 15,265.30 is: 22,814.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,875.81 : 31,199.10 = 15,265.30 : x
  2. Step 2: Convert to fraction form
    20,875.81/31,199.10 = 15,265.30/x
  3. Step 3: Cross multiply
    20,875.81x = 31,199.10 × 15,265.30
  4. Step 4: Simplify right side
    20,875.81x = 476,263,621.23
  5. Step 5: Solve for x
    x = 476,263,621.23/20,875.81
  6. Step 6: Final answer
    x = 22,814.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.