Home / 15,130.20-20,880.27-9,158.49

Finding the Fourth Proportional to 15,130.20, 20,880.27 and 9,158.49

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Solution

The fourth proportional to 15,130.20, 20,880.27 and 9,158.49 is: 12,639.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,130.20 : 20,880.27 = 9,158.49 : x
  2. Step 2: Convert to fraction form
    15,130.20/20,880.27 = 9,158.49/x
  3. Step 3: Cross multiply
    15,130.20x = 20,880.27 × 9,158.49
  4. Step 4: Simplify right side
    15,130.20x = 191,231,743.99
  5. Step 5: Solve for x
    x = 191,231,743.99/15,130.20
  6. Step 6: Final answer
    x = 12,639.08

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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.