Home / 15,420.59-21,269.43-10,642.35

Finding the Fourth Proportional to 15,420.59, 21,269.43 and 10,642.35

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Solution

The fourth proportional to 15,420.59, 21,269.43 and 10,642.35 is: 14,678.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.59 : 21,269.43 = 10,642.35 : x
  2. Step 2: Convert to fraction form
    15,420.59/21,269.43 = 10,642.35/x
  3. Step 3: Cross multiply
    15,420.59x = 21,269.43 × 10,642.35
  4. Step 4: Simplify right side
    15,420.59x = 226,356,718.36
  5. Step 5: Solve for x
    x = 226,356,718.36/15,420.59
  6. Step 6: Final answer
    x = 14,678.87

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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.