Home / 20,991.51-31,487.22-14,397.70

Finding the Fourth Proportional to 20,991.51, 31,487.22 and 14,397.70

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Solution

The fourth proportional to 20,991.51, 31,487.22 and 14,397.70 is: 21,596.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.51 : 31,487.22 = 14,397.70 : x
  2. Step 2: Convert to fraction form
    20,991.51/31,487.22 = 14,397.70/x
  3. Step 3: Cross multiply
    20,991.51x = 31,487.22 × 14,397.70
  4. Step 4: Simplify right side
    20,991.51x = 453,343,547.39
  5. Step 5: Solve for x
    x = 453,343,547.39/20,991.51
  6. Step 6: Final answer
    x = 21,596.52

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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.