Home / 20,730,009.20-28,616,587.06-13,391,421.34

Finding the Fourth Proportional to 20,730,009.20, 28,616,587.06 and 13,391,421.34

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Solution

The fourth proportional to 20,730,009.20, 28,616,587.06 and 13,391,421.34 is: 18,486,088.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730,009.20 : 28,616,587.06 = 13,391,421.34 : x
  2. Step 2: Convert to fraction form
    20,730,009.20/28,616,587.06 = 13,391,421.34/x
  3. Step 3: Cross multiply
    20,730,009.20x = 28,616,587.06 × 13,391,421.34
  4. Step 4: Simplify right side
    20,730,009.20x = 383,216,774,633,251.81
  5. Step 5: Solve for x
    x = 383,216,774,633,251.81/20,730,009.20
  6. Step 6: Final answer
    x = 18,486,088.02

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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.