Home / 9,109.17-12,571.20-5,130.45

Finding the Fourth Proportional to 9,109.17, 12,571.20 and 5,130.45

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Solution

The fourth proportional to 9,109.17, 12,571.20 and 5,130.45 is: 7,080.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,109.17 : 12,571.20 = 5,130.45 : x
  2. Step 2: Convert to fraction form
    9,109.17/12,571.20 = 5,130.45/x
  3. Step 3: Cross multiply
    9,109.17x = 12,571.20 × 5,130.45
  4. Step 4: Simplify right side
    9,109.17x = 64,495,913.04
  5. Step 5: Solve for x
    x = 64,495,913.04/9,109.17
  6. Step 6: Final answer
    x = 7,080.33

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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.