Home / 28,342.80-39,121.76-18,271.24

Finding the Fourth Proportional to 28,342.80, 39,121.76 and 18,271.24

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Solution

The fourth proportional to 28,342.80, 39,121.76 and 18,271.24 is: 25,219.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,342.80 : 39,121.76 = 18,271.24 : x
  2. Step 2: Convert to fraction form
    28,342.80/39,121.76 = 18,271.24/x
  3. Step 3: Cross multiply
    28,342.80x = 39,121.76 × 18,271.24
  4. Step 4: Simplify right side
    28,342.80x = 714,803,066.18
  5. Step 5: Solve for x
    x = 714,803,066.18/28,342.80
  6. Step 6: Final answer
    x = 25,219.92

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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.