Home / 15,830.55-21,848.85-9,120.06

Finding the Fourth Proportional to 15,830.55, 21,848.85 and 9,120.06

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Solution

The fourth proportional to 15,830.55, 21,848.85 and 9,120.06 is: 12,587.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,830.55 : 21,848.85 = 9,120.06 : x
  2. Step 2: Convert to fraction form
    15,830.55/21,848.85 = 9,120.06/x
  3. Step 3: Cross multiply
    15,830.55x = 21,848.85 × 9,120.06
  4. Step 4: Simplify right side
    15,830.55x = 199,262,822.93
  5. Step 5: Solve for x
    x = 199,262,822.93/15,830.55
  6. Step 6: Final answer
    x = 12,587.23

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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.