Home / 21,931.53-30,263.67-12,977.47

Finding the Fourth Proportional to 21,931.53, 30,263.67 and 12,977.47

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Solution

The fourth proportional to 21,931.53, 30,263.67 and 12,977.47 is: 17,907.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,931.53 : 30,263.67 = 12,977.47 : x
  2. Step 2: Convert to fraction form
    21,931.53/30,263.67 = 12,977.47/x
  3. Step 3: Cross multiply
    21,931.53x = 30,263.67 × 12,977.47
  4. Step 4: Simplify right side
    21,931.53x = 392,745,869.51
  5. Step 5: Solve for x
    x = 392,745,869.51/21,931.53
  6. Step 6: Final answer
    x = 17,907.82

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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.