Home / 15,420.55-21,280.75-9,455.51

Finding the Fourth Proportional to 15,420.55, 21,280.75 and 9,455.51

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Solution

The fourth proportional to 15,420.55, 21,280.75 and 9,455.51 is: 13,048.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.55 : 21,280.75 = 9,455.51 : x
  2. Step 2: Convert to fraction form
    15,420.55/21,280.75 = 9,455.51/x
  3. Step 3: Cross multiply
    15,420.55x = 21,280.75 × 9,455.51
  4. Step 4: Simplify right side
    15,420.55x = 201,220,344.43
  5. Step 5: Solve for x
    x = 201,220,344.43/15,420.55
  6. Step 6: Final answer
    x = 13,048.84

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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.