Home / 14,159.80-21,214.10-12,521.40

Finding the Fourth Proportional to 14,159.80, 21,214.10 and 12,521.40

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Solution

The fourth proportional to 14,159.80, 21,214.10 and 12,521.40 is: 18,759.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,159.80 : 21,214.10 = 12,521.40 : x
  2. Step 2: Convert to fraction form
    14,159.80/21,214.10 = 12,521.40/x
  3. Step 3: Cross multiply
    14,159.80x = 21,214.10 × 12,521.40
  4. Step 4: Simplify right side
    14,159.80x = 265,630,231.74
  5. Step 5: Solve for x
    x = 265,630,231.74/14,159.80
  6. Step 6: Final answer
    x = 18,759.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.