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Finding the Fourth Proportional to 15,130.64, 20,880.30 and 8,416.10

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Solution

The fourth proportional to 15,130.64, 20,880.30 and 8,416.10 is: 11,614.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,130.64 : 20,880.30 = 8,416.10 : x
  2. Step 2: Convert to fraction form
    15,130.64/20,880.30 = 8,416.10/x
  3. Step 3: Cross multiply
    15,130.64x = 20,880.30 × 8,416.10
  4. Step 4: Simplify right side
    15,130.64x = 175,730,692.83
  5. Step 5: Solve for x
    x = 175,730,692.83/15,130.64
  6. Step 6: Final answer
    x = 11,614.23

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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.