Home / 15,130.36-20,880.30-8,416.66

Finding the Fourth Proportional to 15,130.36, 20,880.30 and 8,416.66

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Solution

The fourth proportional to 15,130.36, 20,880.30 and 8,416.66 is: 11,615.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,130.36 : 20,880.30 = 8,416.66 : x
  2. Step 2: Convert to fraction form
    15,130.36/20,880.30 = 8,416.66/x
  3. Step 3: Cross multiply
    15,130.36x = 20,880.30 × 8,416.66
  4. Step 4: Simplify right side
    15,130.36x = 175,742,385.80
  5. Step 5: Solve for x
    x = 175,742,385.80/15,130.36
  6. Step 6: Final answer
    x = 11,615.22

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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.