Home / 25,307.12-34,970.20-21,939.14

Finding the Fourth Proportional to 25,307.12, 34,970.20 and 21,939.14

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Solution

The fourth proportional to 25,307.12, 34,970.20 and 21,939.14 is: 30,316.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,307.12 : 34,970.20 = 21,939.14 : x
  2. Step 2: Convert to fraction form
    25,307.12/34,970.20 = 21,939.14/x
  3. Step 3: Cross multiply
    25,307.12x = 34,970.20 × 21,939.14
  4. Step 4: Simplify right side
    25,307.12x = 767,216,113.63
  5. Step 5: Solve for x
    x = 767,216,113.63/25,307.12
  6. Step 6: Final answer
    x = 30,316.22

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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.