Home / 15,312.63-21,129.47-8,937.76

Finding the Fourth Proportional to 15,312.63, 21,129.47 and 8,937.76

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Solution

The fourth proportional to 15,312.63, 21,129.47 and 8,937.76 is: 12,332.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,312.63 : 21,129.47 = 8,937.76 : x
  2. Step 2: Convert to fraction form
    15,312.63/21,129.47 = 8,937.76/x
  3. Step 3: Cross multiply
    15,312.63x = 21,129.47 × 8,937.76
  4. Step 4: Simplify right side
    15,312.63x = 188,850,131.79
  5. Step 5: Solve for x
    x = 188,850,131.79/15,312.63
  6. Step 6: Final answer
    x = 12,332.97

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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.