Home / 31,688.10-43,726.54-18,938.74

Finding the Fourth Proportional to 31,688.10, 43,726.54 and 18,938.74

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Solution

The fourth proportional to 31,688.10, 43,726.54 and 18,938.74 is: 26,133.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,688.10 : 43,726.54 = 18,938.74 : x
  2. Step 2: Convert to fraction form
    31,688.10/43,726.54 = 18,938.74/x
  3. Step 3: Cross multiply
    31,688.10x = 43,726.54 × 18,938.74
  4. Step 4: Simplify right side
    31,688.10x = 828,125,422.81
  5. Step 5: Solve for x
    x = 828,125,422.81/31,688.10
  6. Step 6: Final answer
    x = 26,133.64

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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.