Home / 15,805.08-21,790.80-12,962.16

Finding the Fourth Proportional to 15,805.08, 21,790.80 and 12,962.16

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Solution

The fourth proportional to 15,805.08, 21,790.80 and 12,962.16 is: 17,871.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,805.08 : 21,790.80 = 12,962.16 : x
  2. Step 2: Convert to fraction form
    15,805.08/21,790.80 = 12,962.16/x
  3. Step 3: Cross multiply
    15,805.08x = 21,790.80 × 12,962.16
  4. Step 4: Simplify right side
    15,805.08x = 282,455,836.13
  5. Step 5: Solve for x
    x = 282,455,836.13/15,805.08
  6. Step 6: Final answer
    x = 17,871.21

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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.