Home / 20,953.47-31,417.84-10,423.06

Finding the Fourth Proportional to 20,953.47, 31,417.84 and 10,423.06

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Solution

The fourth proportional to 20,953.47, 31,417.84 and 10,423.06 is: 15,628.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,953.47 : 31,417.84 = 10,423.06 : x
  2. Step 2: Convert to fraction form
    20,953.47/31,417.84 = 10,423.06/x
  3. Step 3: Cross multiply
    20,953.47x = 31,417.84 × 10,423.06
  4. Step 4: Simplify right side
    20,953.47x = 327,470,031.39
  5. Step 5: Solve for x
    x = 327,470,031.39/20,953.47
  6. Step 6: Final answer
    x = 15,628.44

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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.