Home / 20,669.51-28,473.30-14,987.57

Finding the Fourth Proportional to 20,669.51, 28,473.30 and 14,987.57

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Solution

The fourth proportional to 20,669.51, 28,473.30 and 14,987.57 is: 20,646.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,669.51 : 28,473.30 = 14,987.57 : x
  2. Step 2: Convert to fraction form
    20,669.51/28,473.30 = 14,987.57/x
  3. Step 3: Cross multiply
    20,669.51x = 28,473.30 × 14,987.57
  4. Step 4: Simplify right side
    20,669.51x = 426,745,434.51
  5. Step 5: Solve for x
    x = 426,745,434.51/20,669.51
  6. Step 6: Final answer
    x = 20,646.14

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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.