Home / 28,485.65-42,728.75-18,687.08

Finding the Fourth Proportional to 28,485.65, 42,728.75 and 18,687.08

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Solution

The fourth proportional to 28,485.65, 42,728.75 and 18,687.08 is: 28,030.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,485.65 : 42,728.75 = 18,687.08 : x
  2. Step 2: Convert to fraction form
    28,485.65/42,728.75 = 18,687.08/x
  3. Step 3: Cross multiply
    28,485.65x = 42,728.75 × 18,687.08
  4. Step 4: Simplify right side
    28,485.65x = 798,475,569.55
  5. Step 5: Solve for x
    x = 798,475,569.55/28,485.65
  6. Step 6: Final answer
    x = 28,030.80

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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.