Home / 15,730.80-21,706.20-10,417.20

Finding the Fourth Proportional to 15,730.80, 21,706.20 and 10,417.20

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Solution

The fourth proportional to 15,730.80, 21,706.20 and 10,417.20 is: 14,374.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,730.80 : 21,706.20 = 10,417.20 : x
  2. Step 2: Convert to fraction form
    15,730.80/21,706.20 = 10,417.20/x
  3. Step 3: Cross multiply
    15,730.80x = 21,706.20 × 10,417.20
  4. Step 4: Simplify right side
    15,730.80x = 226,117,826.64
  5. Step 5: Solve for x
    x = 226,117,826.64/15,730.80
  6. Step 6: Final answer
    x = 14,374.21

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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.