Home / 30,953.16-42,718.78-18,378.68

Finding the Fourth Proportional to 30,953.16, 42,718.78 and 18,378.68

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Solution

The fourth proportional to 30,953.16, 42,718.78 and 18,378.68 is: 25,364.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,953.16 : 42,718.78 = 18,378.68 : x
  2. Step 2: Convert to fraction form
    30,953.16/42,718.78 = 18,378.68/x
  3. Step 3: Cross multiply
    30,953.16x = 42,718.78 × 18,378.68
  4. Step 4: Simplify right side
    30,953.16x = 785,114,787.61
  5. Step 5: Solve for x
    x = 785,114,787.61/30,953.16
  6. Step 6: Final answer
    x = 25,364.61

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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.