Home / 19,128.64-28,693.76-5,981.28

Finding the Fourth Proportional to 19,128.64, 28,693.76 and 5,981.28

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Solution

The fourth proportional to 19,128.64, 28,693.76 and 5,981.28 is: 8,972.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,128.64 : 28,693.76 = 5,981.28 : x
  2. Step 2: Convert to fraction form
    19,128.64/28,693.76 = 5,981.28/x
  3. Step 3: Cross multiply
    19,128.64x = 28,693.76 × 5,981.28
  4. Step 4: Simplify right side
    19,128.64x = 171,625,412.81
  5. Step 5: Solve for x
    x = 171,625,412.81/19,128.64
  6. Step 6: Final answer
    x = 8,972.17

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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.