Home / 31,070.79-42,863.02-21,002.74

Finding the Fourth Proportional to 31,070.79, 42,863.02 and 21,002.74

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Solution

The fourth proportional to 31,070.79, 42,863.02 and 21,002.74 is: 28,973.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,070.79 : 42,863.02 = 21,002.74 : x
  2. Step 2: Convert to fraction form
    31,070.79/42,863.02 = 21,002.74/x
  3. Step 3: Cross multiply
    31,070.79x = 42,863.02 × 21,002.74
  4. Step 4: Simplify right side
    31,070.79x = 900,240,864.67
  5. Step 5: Solve for x
    x = 900,240,864.67/31,070.79
  6. Step 6: Final answer
    x = 28,973.86

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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.