Home / 15,412.14-21,280.59-12,774.78

Finding the Fourth Proportional to 15,412.14, 21,280.59 and 12,774.78

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Solution

The fourth proportional to 15,412.14, 21,280.59 and 12,774.78 is: 17,639.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,412.14 : 21,280.59 = 12,774.78 : x
  2. Step 2: Convert to fraction form
    15,412.14/21,280.59 = 12,774.78/x
  3. Step 3: Cross multiply
    15,412.14x = 21,280.59 × 12,774.78
  4. Step 4: Simplify right side
    15,412.14x = 271,854,855.52
  5. Step 5: Solve for x
    x = 271,854,855.52/15,412.14
  6. Step 6: Final answer
    x = 17,639.01

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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.