Home / 15,870.42-21,900.03-8,699.19

Finding the Fourth Proportional to 15,870.42, 21,900.03 and 8,699.19

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Solution

The fourth proportional to 15,870.42, 21,900.03 and 8,699.19 is: 12,004.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,870.42 : 21,900.03 = 8,699.19 : x
  2. Step 2: Convert to fraction form
    15,870.42/21,900.03 = 8,699.19/x
  3. Step 3: Cross multiply
    15,870.42x = 21,900.03 × 8,699.19
  4. Step 4: Simplify right side
    15,870.42x = 190,512,521.98
  5. Step 5: Solve for x
    x = 190,512,521.98/15,870.42
  6. Step 6: Final answer
    x = 12,004.25

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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.