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Finding the Fourth Proportional to 5,130.55, 7,080.21 and 2,892.23

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Solution

The fourth proportional to 5,130.55, 7,080.21 and 2,892.23 is: 3,991.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,130.55 : 7,080.21 = 2,892.23 : x
  2. Step 2: Convert to fraction form
    5,130.55/7,080.21 = 2,892.23/x
  3. Step 3: Cross multiply
    5,130.55x = 7,080.21 × 2,892.23
  4. Step 4: Simplify right side
    5,130.55x = 20,477,595.77
  5. Step 5: Solve for x
    x = 20,477,595.77/5,130.55
  6. Step 6: Final answer
    x = 3,991.31

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Half scale
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Double scale
Find fourth proportional to 5,131.55, 7,081.59 and 2,893.23
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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.