Home / 15,612.78-21,547.72-10,039.98

Finding the Fourth Proportional to 15,612.78, 21,547.72 and 10,039.98

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Solution

The fourth proportional to 15,612.78, 21,547.72 and 10,039.98 is: 13,856.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,612.78 : 21,547.72 = 10,039.98 : x
  2. Step 2: Convert to fraction form
    15,612.78/21,547.72 = 10,039.98/x
  3. Step 3: Cross multiply
    15,612.78x = 21,547.72 × 10,039.98
  4. Step 4: Simplify right side
    15,612.78x = 216,338,677.85
  5. Step 5: Solve for x
    x = 216,338,677.85/15,612.78
  6. Step 6: Final answer
    x = 13,856.51

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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.