Home / 15,718.60-21,700.64-10,420.59

Finding the Fourth Proportional to 15,718.60, 21,700.64 and 10,420.59

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Solution

The fourth proportional to 15,718.60, 21,700.64 and 10,420.59 is: 14,386.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,718.60 : 21,700.64 = 10,420.59 : x
  2. Step 2: Convert to fraction form
    15,718.60/21,700.64 = 10,420.59/x
  3. Step 3: Cross multiply
    15,718.60x = 21,700.64 × 10,420.59
  4. Step 4: Simplify right side
    15,718.60x = 226,133,420.07
  5. Step 5: Solve for x
    x = 226,133,420.07/15,718.60
  6. Step 6: Final answer
    x = 14,386.36

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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.