Home / 31,002.35-42,763.28-21,307.19

Finding the Fourth Proportional to 31,002.35, 42,763.28 and 21,307.19

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Solution

The fourth proportional to 31,002.35, 42,763.28 and 21,307.19 is: 29,390.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,002.35 : 42,763.28 = 21,307.19 : x
  2. Step 2: Convert to fraction form
    31,002.35/42,763.28 = 21,307.19/x
  3. Step 3: Cross multiply
    31,002.35x = 42,763.28 × 21,307.19
  4. Step 4: Simplify right side
    31,002.35x = 911,165,011.63
  5. Step 5: Solve for x
    x = 911,165,011.63/31,002.35
  6. Step 6: Final answer
    x = 29,390.20

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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.