Home / 19,685.80-29,528.70-18,908.20

Finding the Fourth Proportional to 19,685.80, 29,528.70 and 18,908.20

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Solution

The fourth proportional to 19,685.80, 29,528.70 and 18,908.20 is: 28,362.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,685.80 : 29,528.70 = 18,908.20 : x
  2. Step 2: Convert to fraction form
    19,685.80/29,528.70 = 18,908.20/x
  3. Step 3: Cross multiply
    19,685.80x = 29,528.70 × 18,908.20
  4. Step 4: Simplify right side
    19,685.80x = 558,334,565.34
  5. Step 5: Solve for x
    x = 558,334,565.34/19,685.80
  6. Step 6: Final answer
    x = 28,362.30

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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.