Home / 21,539.95-29,727.45-12,590.47

Finding the Fourth Proportional to 21,539.95, 29,727.45 and 12,590.47

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Solution

The fourth proportional to 21,539.95, 29,727.45 and 12,590.47 is: 17,376.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,539.95 : 29,727.45 = 12,590.47 : x
  2. Step 2: Convert to fraction form
    21,539.95/29,727.45 = 12,590.47/x
  3. Step 3: Cross multiply
    21,539.95x = 29,727.45 × 12,590.47
  4. Step 4: Simplify right side
    21,539.95x = 374,282,567.40
  5. Step 5: Solve for x
    x = 374,282,567.40/21,539.95
  6. Step 6: Final answer
    x = 17,376.20

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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.