Finding the Fourth Proportional to 21,615,315.84, 29,824,252.20 and 12,911,784.84
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Solution
The fourth proportional to 21,615,315.84, 29,824,252.20 and 12,911,784.84 is: 17,815,345.85
Step by Step Solution
- Step 1: Write the proportion equation
21,615,315.84 : 29,824,252.20 = 12,911,784.84 : x - Step 2: Convert to fraction form
21,615,315.84/29,824,252.20 = 12,911,784.84/x - Step 3: Cross multiply
21,615,315.84x = 29,824,252.20 × 12,911,784.84 - Step 4: Simplify right side
21,615,315.84x = 385,084,327,420,296.62 - Step 5: Solve for x
x = 385,084,327,420,296.62/21,615,315.84 - Step 6: Final answer
x = 17,815,345.85
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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.