Home / 31,311.76-43,218.40-19,368.16

Finding the Fourth Proportional to 31,311.76, 43,218.40 and 19,368.16

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Solution

The fourth proportional to 31,311.76, 43,218.40 and 19,368.16 is: 26,733.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,311.76 : 43,218.40 = 19,368.16 : x
  2. Step 2: Convert to fraction form
    31,311.76/43,218.40 = 19,368.16/x
  3. Step 3: Cross multiply
    31,311.76x = 43,218.40 × 19,368.16
  4. Step 4: Simplify right side
    31,311.76x = 837,060,886.14
  5. Step 5: Solve for x
    x = 837,060,886.14/31,311.76
  6. Step 6: Final answer
    x = 26,733.12

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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.