Home / 15,319.61-21,140.51-9,361.25

Finding the Fourth Proportional to 15,319.61, 21,140.51 and 9,361.25

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Solution

The fourth proportional to 15,319.61, 21,140.51 and 9,361.25 is: 12,918.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,319.61 : 21,140.51 = 9,361.25 : x
  2. Step 2: Convert to fraction form
    15,319.61/21,140.51 = 9,361.25/x
  3. Step 3: Cross multiply
    15,319.61x = 21,140.51 × 9,361.25
  4. Step 4: Simplify right side
    15,319.61x = 197,901,599.24
  5. Step 5: Solve for x
    x = 197,901,599.24/15,319.61
  6. Step 6: Final answer
    x = 12,918.19

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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.