Home / 15,420.31-21,280.41-9,455.26

Finding the Fourth Proportional to 15,420.31, 21,280.41 and 9,455.26

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Solution

The fourth proportional to 15,420.31, 21,280.41 and 9,455.26 is: 13,048.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.31 : 21,280.41 = 9,455.26 : x
  2. Step 2: Convert to fraction form
    15,420.31/21,280.41 = 9,455.26/x
  3. Step 3: Cross multiply
    15,420.31x = 21,280.41 × 9,455.26
  4. Step 4: Simplify right side
    15,420.31x = 201,211,809.46
  5. Step 5: Solve for x
    x = 201,211,809.46/15,420.31
  6. Step 6: Final answer
    x = 13,048.50

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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.