Home / 21,980.74-30,343.90-12,547.48

Finding the Fourth Proportional to 21,980.74, 30,343.90 and 12,547.48

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Solution

The fourth proportional to 21,980.74, 30,343.90 and 12,547.48 is: 17,321.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,980.74 : 30,343.90 = 12,547.48 : x
  2. Step 2: Convert to fraction form
    21,980.74/30,343.90 = 12,547.48/x
  3. Step 3: Cross multiply
    21,980.74x = 30,343.90 × 12,547.48
  4. Step 4: Simplify right side
    21,980.74x = 380,739,478.37
  5. Step 5: Solve for x
    x = 380,739,478.37/21,980.74
  6. Step 6: Final answer
    x = 17,321.50

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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.