Home / 31,438.13-43,384.61-18,862.88

Finding the Fourth Proportional to 31,438.13, 43,384.61 and 18,862.88

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Solution

The fourth proportional to 31,438.13, 43,384.61 and 18,862.88 is: 26,030.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,438.13 : 43,384.61 = 18,862.88 : x
  2. Step 2: Convert to fraction form
    31,438.13/43,384.61 = 18,862.88/x
  3. Step 3: Cross multiply
    31,438.13x = 43,384.61 × 18,862.88
  4. Step 4: Simplify right side
    31,438.13x = 818,358,522.51
  5. Step 5: Solve for x
    x = 818,358,522.51/31,438.13
  6. Step 6: Final answer
    x = 26,030.77

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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.