Home / 28,920.04-39,870.18-18,304.36

Finding the Fourth Proportional to 28,920.04, 39,870.18 and 18,304.36

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Solution

The fourth proportional to 28,920.04, 39,870.18 and 18,304.36 is: 25,235.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,920.04 : 39,870.18 = 18,304.36 : x
  2. Step 2: Convert to fraction form
    28,920.04/39,870.18 = 18,304.36/x
  3. Step 3: Cross multiply
    28,920.04x = 39,870.18 × 18,304.36
  4. Step 4: Simplify right side
    28,920.04x = 729,798,127.98
  5. Step 5: Solve for x
    x = 729,798,127.98/28,920.04
  6. Step 6: Final answer
    x = 25,235.03

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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.