Home / 7,578.02-10,456.64-4,220.40

Finding the Fourth Proportional to 7,578.02, 10,456.64 and 4,220.40

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Solution

The fourth proportional to 7,578.02, 10,456.64 and 4,220.40 is: 5,823.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,578.02 : 10,456.64 = 4,220.40 : x
  2. Step 2: Convert to fraction form
    7,578.02/10,456.64 = 4,220.40/x
  3. Step 3: Cross multiply
    7,578.02x = 10,456.64 × 4,220.40
  4. Step 4: Simplify right side
    7,578.02x = 44,131,203.46
  5. Step 5: Solve for x
    x = 44,131,203.46/7,578.02
  6. Step 6: Final answer
    x = 5,823.58

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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.