Home / 15,518.16-21,412.23-10,139.18

Finding the Fourth Proportional to 15,518.16, 21,412.23 and 10,139.18

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Solution

The fourth proportional to 15,518.16, 21,412.23 and 10,139.18 is: 13,990.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,518.16 : 21,412.23 = 10,139.18 : x
  2. Step 2: Convert to fraction form
    15,518.16/21,412.23 = 10,139.18/x
  3. Step 3: Cross multiply
    15,518.16x = 21,412.23 × 10,139.18
  4. Step 4: Simplify right side
    15,518.16x = 217,102,347.11
  5. Step 5: Solve for x
    x = 217,102,347.11/15,518.16
  6. Step 6: Final answer
    x = 13,990.21

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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.