Home / 15,870.05-21,889.29-10,486.25

Finding the Fourth Proportional to 15,870.05, 21,889.29 and 10,486.25

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Solution

The fourth proportional to 15,870.05, 21,889.29 and 10,486.25 is: 14,463.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,870.05 : 21,889.29 = 10,486.25 : x
  2. Step 2: Convert to fraction form
    15,870.05/21,889.29 = 10,486.25/x
  3. Step 3: Cross multiply
    15,870.05x = 21,889.29 × 10,486.25
  4. Step 4: Simplify right side
    15,870.05x = 229,536,405.38
  5. Step 5: Solve for x
    x = 229,536,405.38/15,870.05
  6. Step 6: Final answer
    x = 14,463.50

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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.