Home / 18,923.64-28,368.96-7,823.40

Finding the Fourth Proportional to 18,923.64, 28,368.96 and 7,823.40

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Solution

The fourth proportional to 18,923.64, 28,368.96 and 7,823.40 is: 11,728.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,923.64 : 28,368.96 = 7,823.40 : x
  2. Step 2: Convert to fraction form
    18,923.64/28,368.96 = 7,823.40/x
  3. Step 3: Cross multiply
    18,923.64x = 28,368.96 × 7,823.40
  4. Step 4: Simplify right side
    18,923.64x = 221,941,721.66
  5. Step 5: Solve for x
    x = 221,941,721.66/18,923.64
  6. Step 6: Final answer
    x = 11,728.28

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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.