Home / 20,987.90-28,953.95-14,179.74

Finding the Fourth Proportional to 20,987.90, 28,953.95 and 14,179.74

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Solution

The fourth proportional to 20,987.90, 28,953.95 and 14,179.74 is: 19,561.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.90 : 28,953.95 = 14,179.74 : x
  2. Step 2: Convert to fraction form
    20,987.90/28,953.95 = 14,179.74/x
  3. Step 3: Cross multiply
    20,987.90x = 28,953.95 × 14,179.74
  4. Step 4: Simplify right side
    20,987.90x = 410,559,412.07
  5. Step 5: Solve for x
    x = 410,559,412.07/20,987.90
  6. Step 6: Final answer
    x = 19,561.72

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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.