Home / 15,730.04-21,708.24-8,656.40

Finding the Fourth Proportional to 15,730.04, 21,708.24 and 8,656.40

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Solution

The fourth proportional to 15,730.04, 21,708.24 and 8,656.40 is: 11,946.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,730.04 : 21,708.24 = 8,656.40 : x
  2. Step 2: Convert to fraction form
    15,730.04/21,708.24 = 8,656.40/x
  3. Step 3: Cross multiply
    15,730.04x = 21,708.24 × 8,656.40
  4. Step 4: Simplify right side
    15,730.04x = 187,915,208.74
  5. Step 5: Solve for x
    x = 187,915,208.74/15,730.04
  6. Step 6: Final answer
    x = 11,946.26

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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.