Home / 28,356.28-39,145.08-18,931.12

Finding the Fourth Proportional to 28,356.28, 39,145.08 and 18,931.12

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Solution

The fourth proportional to 28,356.28, 39,145.08 and 18,931.12 is: 26,133.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,356.28 : 39,145.08 = 18,931.12 : x
  2. Step 2: Convert to fraction form
    28,356.28/39,145.08 = 18,931.12/x
  3. Step 3: Cross multiply
    28,356.28x = 39,145.08 × 18,931.12
  4. Step 4: Simplify right side
    28,356.28x = 741,060,206.89
  5. Step 5: Solve for x
    x = 741,060,206.89/28,356.28
  6. Step 6: Final answer
    x = 26,133.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.