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Finding the Fourth Proportional to 7,913.76, 10,920.55 and 4,328.01

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Solution

The fourth proportional to 7,913.76, 10,920.55 and 4,328.01 is: 5,972.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,913.76 : 10,920.55 = 4,328.01 : x
  2. Step 2: Convert to fraction form
    7,913.76/10,920.55 = 4,328.01/x
  3. Step 3: Cross multiply
    7,913.76x = 10,920.55 × 4,328.01
  4. Step 4: Simplify right side
    7,913.76x = 47,264,231.40
  5. Step 5: Solve for x
    x = 47,264,231.40/7,913.76
  6. Step 6: Final answer
    x = 5,972.41

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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.