Home / 21,018.95-31,528.35-6,980.04

Finding the Fourth Proportional to 21,018.95, 31,528.35 and 6,980.04

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Solution

The fourth proportional to 21,018.95, 31,528.35 and 6,980.04 is: 10,470.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.95 : 31,528.35 = 6,980.04 : x
  2. Step 2: Convert to fraction form
    21,018.95/31,528.35 = 6,980.04/x
  3. Step 3: Cross multiply
    21,018.95x = 31,528.35 × 6,980.04
  4. Step 4: Simplify right side
    21,018.95x = 220,069,144.13
  5. Step 5: Solve for x
    x = 220,069,144.13/21,018.95
  6. Step 6: Final answer
    x = 10,470.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.