Home / 21,012.29-31,510.57-6,969.70

Finding the Fourth Proportional to 21,012.29, 31,510.57 and 6,969.70

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Solution

The fourth proportional to 21,012.29, 31,510.57 and 6,969.70 is: 10,451.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.29 : 31,510.57 = 6,969.70 : x
  2. Step 2: Convert to fraction form
    21,012.29/31,510.57 = 6,969.70/x
  3. Step 3: Cross multiply
    21,012.29x = 31,510.57 × 6,969.70
  4. Step 4: Simplify right side
    21,012.29x = 219,619,077.51
  5. Step 5: Solve for x
    x = 219,619,077.51/21,012.29
  6. Step 6: Final answer
    x = 10,451.94

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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.