Home / 14,987.14-20,631.45-12,878.98

Finding the Fourth Proportional to 14,987.14, 20,631.45 and 12,878.98

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Solution

The fourth proportional to 14,987.14, 20,631.45 and 12,878.98 is: 17,729.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,987.14 : 20,631.45 = 12,878.98 : x
  2. Step 2: Convert to fraction form
    14,987.14/20,631.45 = 12,878.98/x
  3. Step 3: Cross multiply
    14,987.14x = 20,631.45 × 12,878.98
  4. Step 4: Simplify right side
    14,987.14x = 265,712,031.92
  5. Step 5: Solve for x
    x = 265,712,031.92/14,987.14
  6. Step 6: Final answer
    x = 17,729.34

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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.