Home / 30,470.40-45,639.36-19,349.28

Finding the Fourth Proportional to 30,470.40, 45,639.36 and 19,349.28

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Solution

The fourth proportional to 30,470.40, 45,639.36 and 19,349.28 is: 28,981.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,470.40 : 45,639.36 = 19,349.28 : x
  2. Step 2: Convert to fraction form
    30,470.40/45,639.36 = 19,349.28/x
  3. Step 3: Cross multiply
    30,470.40x = 45,639.36 × 19,349.28
  4. Step 4: Simplify right side
    30,470.40x = 883,088,755.66
  5. Step 5: Solve for x
    x = 883,088,755.66/30,470.40
  6. Step 6: Final answer
    x = 28,981.86

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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.