Home / 28,476.80-42,715.20-19,145.60

Finding the Fourth Proportional to 28,476.80, 42,715.20 and 19,145.60

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Solution

The fourth proportional to 28,476.80, 42,715.20 and 19,145.60 is: 28,718.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,476.80 : 42,715.20 = 19,145.60 : x
  2. Step 2: Convert to fraction form
    28,476.80/42,715.20 = 19,145.60/x
  3. Step 3: Cross multiply
    28,476.80x = 42,715.20 × 19,145.60
  4. Step 4: Simplify right side
    28,476.80x = 817,808,133.12
  5. Step 5: Solve for x
    x = 817,808,133.12/28,476.80
  6. Step 6: Final answer
    x = 28,718.40

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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.