Home / 15,483.81-21,357.91-12,347.49

Finding the Fourth Proportional to 15,483.81, 21,357.91 and 12,347.49

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Solution

The fourth proportional to 15,483.81, 21,357.91 and 12,347.49 is: 17,031.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,483.81 : 21,357.91 = 12,347.49 : x
  2. Step 2: Convert to fraction form
    15,483.81/21,357.91 = 12,347.49/x
  3. Step 3: Cross multiply
    15,483.81x = 21,357.91 × 12,347.49
  4. Step 4: Simplify right side
    15,483.81x = 263,716,580.15
  5. Step 5: Solve for x
    x = 263,716,580.15/15,483.81
  6. Step 6: Final answer
    x = 17,031.76

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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.