Home / 21,065.23-31,570.53-8,570.74

Finding the Fourth Proportional to 21,065.23, 31,570.53 and 8,570.74

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Solution

The fourth proportional to 21,065.23, 31,570.53 and 8,570.74 is: 12,845.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,065.23 : 31,570.53 = 8,570.74 : x
  2. Step 2: Convert to fraction form
    21,065.23/31,570.53 = 8,570.74/x
  3. Step 3: Cross multiply
    21,065.23x = 31,570.53 × 8,570.74
  4. Step 4: Simplify right side
    21,065.23x = 270,582,804.29
  5. Step 5: Solve for x
    x = 270,582,804.29/21,065.23
  6. Step 6: Final answer
    x = 12,845.00

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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.