Home / 30,647.09-42,264.90-19,880.70

Finding the Fourth Proportional to 30,647.09, 42,264.90 and 19,880.70

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Solution

The fourth proportional to 30,647.09, 42,264.90 and 19,880.70 is: 27,417.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,647.09 : 42,264.90 = 19,880.70 : x
  2. Step 2: Convert to fraction form
    30,647.09/42,264.90 = 19,880.70/x
  3. Step 3: Cross multiply
    30,647.09x = 42,264.90 × 19,880.70
  4. Step 4: Simplify right side
    30,647.09x = 840,255,797.43
  5. Step 5: Solve for x
    x = 840,255,797.43/30,647.09
  6. Step 6: Final answer
    x = 27,417.15

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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.