Home / 30,378.87-41,925.74-18,439.47

Finding the Fourth Proportional to 30,378.87, 41,925.74 and 18,439.47

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Solution

The fourth proportional to 30,378.87, 41,925.74 and 18,439.47 is: 25,448.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,378.87 : 41,925.74 = 18,439.47 : x
  2. Step 2: Convert to fraction form
    30,378.87/41,925.74 = 18,439.47/x
  3. Step 3: Cross multiply
    30,378.87x = 41,925.74 × 18,439.47
  4. Step 4: Simplify right side
    30,378.87x = 773,088,332.76
  5. Step 5: Solve for x
    x = 773,088,332.76/30,378.87
  6. Step 6: Final answer
    x = 25,448.23

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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.