Home / 15,321.79-21,152.13-10,312.35

Finding the Fourth Proportional to 15,321.79, 21,152.13 and 10,312.35

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Solution

The fourth proportional to 15,321.79, 21,152.13 and 10,312.35 is: 14,236.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.79 : 21,152.13 = 10,312.35 : x
  2. Step 2: Convert to fraction form
    15,321.79/21,152.13 = 10,312.35/x
  3. Step 3: Cross multiply
    15,321.79x = 21,152.13 × 10,312.35
  4. Step 4: Simplify right side
    15,321.79x = 218,128,167.81
  5. Step 5: Solve for x
    x = 218,128,167.81/15,321.79
  6. Step 6: Final answer
    x = 14,236.47

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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.