Home / 31,126.48-42,953.76-16,979.28

Finding the Fourth Proportional to 31,126.48, 42,953.76 and 16,979.28

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Solution

The fourth proportional to 31,126.48, 42,953.76 and 16,979.28 is: 23,430.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,126.48 : 42,953.76 = 16,979.28 : x
  2. Step 2: Convert to fraction form
    31,126.48/42,953.76 = 16,979.28/x
  3. Step 3: Cross multiply
    31,126.48x = 42,953.76 × 16,979.28
  4. Step 4: Simplify right side
    31,126.48x = 729,323,918.09
  5. Step 5: Solve for x
    x = 729,323,918.09/31,126.48
  6. Step 6: Final answer
    x = 23,430.98

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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.