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Finding the Fourth Proportional to 5,315.60, 7,973.40 and 5,277.20

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Solution

The fourth proportional to 5,315.60, 7,973.40 and 5,277.20 is: 7,915.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,315.60 : 7,973.40 = 5,277.20 : x
  2. Step 2: Convert to fraction form
    5,315.60/7,973.40 = 5,277.20/x
  3. Step 3: Cross multiply
    5,315.60x = 7,973.40 × 5,277.20
  4. Step 4: Simplify right side
    5,315.60x = 42,077,226.48
  5. Step 5: Solve for x
    x = 42,077,226.48/5,315.60
  6. Step 6: Final answer
    x = 7,915.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.